My apologies for the delay in response. I had to iron out something with some of my colleagues about your post

To your problem at hand; If I am not mistaken, the unit is a couple of
years old and therefore we could expect some deterioration in any of
the hardware components. It is also possible that it could be due to
dirt accumulated. If you feel comfortable opening your unit and
performing a DIY (do-it-yourself), then it should be possible to
restore the PC to operational status.

Why don't we try cleaning first the inside. Upon removal of the side panel, pls pay special attention to the following:
1. heatsink and fan of the CPU;
2. memory and memory slots;
3. video card, video card heatsink & blower, AGP slot;
4. additionally, you can use a pencil eraser to clean the little gold
pins of the memory and the video card (assuming the computer has an
add-on video card and not a built-in to the motherboard).

A clean, dry paint brush would help. A vacuum cleaner would also be
nice. For those areas that are hard to reach, a can of compressed air
could be used.

Additionally, there would be a coin size battery inside, should it possible, it may also be worth your while to replace it.

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If the monitor gets no signal it will show orange. or ,It's hibernating or sleeping. Shut down computer, reboot, open Control Panel, Power settings, change to High Performance, change Hibernate to never or disable, change sleep to never or disable. Shut down the computer and monitor when not in use. It will last longer and reset the computer every day when turned on.

How to Make Windows XP Startup FasterSteps1.Click on Start, then Run, and type "msconfig". Wait for a new window to pop up.2.Look under the "BOOT.INI" tab. You will see a box labeled "Timeout:", and a numerical value. By default, it's 30, which means 30 seconds of wait time before boot. This can be changed, using 3 seconds. (Note: if you have more than one operating system, this means the wait time to startup to the highlighted OS. you might want a bit more than 3 seconds)3.Delete the temporary files periodically from your computer to make the applications run faster. Type %Temp% in the run dialog box by clicking on Start -> Run, and click on "OK". You will see an open folder with many files. Click on the Edit menu and click on Select all and then click on the File menu and select Delete. Note: Always confirm that the folder which is opened has a temp on the top of menu bar and the folder indicates that it is a temporary folder.4.Perform a scandisk to see that your computer hard drive is in healthy condition and it helps your computer run faster.5.Always perform a disk defragmentation at least once in a month. start the disk defragmentation from the system tools available in the accessories from the start menu. it takes a longer time and it is advised not to run any applications in the computer including the screen savers, while running disk defragmentation.HibernationAfter you have done all this, another method you can do is to allow the computer to hibernate. Hibernation closes and opens Windows faster than normally. However, Hibernation is a good long-term solution, as it does not waste electricity.1.Go to Start->Control Panel->Power Options. Click on the Hibernate tab.2.Click on the box that says "Enable hibernation" to check it.3.Click on the Advanced tab and change the Power buttons options if you want to hibernate by pressing the sleep button or the power button. Otherwise, holding the Shift key while in the Turn Off Computer menu will give you the option to hibernate.4.Restart your computer every week or so to clear your computer.The power can then be completely turned off, even at the socket so that no power is wasted.Prefetch1.Simply browse to the windows folder (Ex: C:Windows) and under there you should see the prefetch folder. Go into the prefetch folder and delete all the files (Careful! It should look like this c:windowsprefetch). We need to edit a registry key to tweak it. Open regedit and browse to this key:HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlSession ManagerMemory ManagementPrefetchParametersUnder this key you should see a value named: EnablePrefetcherIt has 4 possible values:0- Disabled : The prefetch system is turned off.1- Application : The prefetch only caches applications.2- Boot : The prefetch only caches boot system files.3- All : The prefetch caches boot, and application files.We don't want to disable it entirely. This would actually make boot times *longer*. This is because this feature is also used to speed up the loading of boot files. That is why we are going to pick the number 2 option. It allows us to keep the advantage of caching system files, without continually clogging the system up with applications.Set the value to 2 and reboot.The 2nd time you boot it should boot much faster. Remember that the side effect is that launching individual applications once windows has loaded will now be slightly slower.TipsWhen installing new software choose not to add the program to the startup folder.. Regularly check to see what programs are running from your startup folder as malicious programs such as spyware may have installed itself without your knowledge.. If you accidentally uncheck a program, just retrace the steps above and recheck the program and restart your computer.. Adding more RAM to a Windows XP computer helps it boot faster, and since RAM prices are very low these days, it's an easy way to boot faster.. uncheck system startup unnecessary startup programs*Warnings. Save any open work before making changes.. Shut down all applications before making changes.. Don't uncheck anything from Symantec or any other anti-virus or anti-malware software. Doing so may disable or hinder the protection of your PC.

1.Turn off Windows Search IndexingWindows Vista search indexing is constantly reviewing files on your system to make their contents available for quick searching. This is handy, but can severely impact system performance.To disable this constant indexing:* Click Start then Computer* Right Click the C: Drive* On General Tab, Uncheck Index this drive for faster searching* On the subsequent dialog box, Select Include subfolders and files
2. Turn off Remote Differential CompressionRemote Differential Compression measures the changes in files over a network to transfer them with minimal bandwidth rather than transferring an entire file that has previously been moved. By constantly checking for file changes, this service can hinder system performance.To disable this service:* Open Control Panel* Switch to Classic View* Select Program Features* Choose Turn Windows features on and off* Scroll down and uncheck Remote Differential Compression
3. Turn off Automatic Windows Defender OperationWindows Defender real-time protection against malware continues to run despite having Automatic operation disabled.To disable this feature:* Open Control Panel* Select Windows Defender* Choose Tools from the top menu* Select Options* Uncheck Auto Start at the bottom of the window
4. Turn off Automatic Disk DefragmentationWindows Vista and its always-on defragment feature isn’t really that necessary and can cause system slow down. Just remember to run a defrag manually every week or so.To disable this:* Click Start then Computer* Right Click the C: Drive* Select the Tools Tab* Uncheck Run on a schedule
5. Add a 2GB or higher USB Flash drive to take advantage of Windows Ready Boost (Additional Memory Cache)Ready Boost is Microsoft’s name for using a USB thumb/flash drive to provide some quick access memory the operating system can use as extra RAM. The Ready Boost system can significantly improve system performance.To set this up:* Insert a USB Flash Drive (preferably 2GB or more)* Click Start then Computer* Right Click the USB Drive in My Computer* Select the Ready Boost Tab* Choose Use this device* Select as much space as you can free up for RAM usage vs. Storage
6. Turn off Windows HibernationWindows hibernation background services can use a large amount of system resources. If you don’t use the Hibernate feature on a regular basis you may want to disable it to give Vista a performance boost.To disable Hibernation:* Select the Control Panel then Power Options* Click Change Plan Settings* Click on Change Advanced Power Settings* Expand the Sleep selection* Expand the Hibernate After selection* Crank the selector down to zero* Click Apply
7. Turn off System RestoreAnalysis and restore point creation by Windows Vista can eat a fair amount of system resources. Disabling this service will obviously mean the system restore feature in Vista will not be available in the event of a system crash. Change this at your own risk.* Control Panel>System* Click System Protection on the left panel* Uncheck the main system drive* Agree to the confirmation
8. Disable User Access Control (UAC)This much-loathed new Vista feature attempts to protect your system from malware infection by making you manually confirm a whole host of everyday user operations. While it doesn’t directly impact performance, it can be annoying and might be more hassle than good.To disable User Access Control:* Click Start then Control Panel* Select User Accounts* Select Turn User Account Control on or off* Uncheck User Account Control Box* Restart as recommended
9. Disable excess Windows Services that Auto-Launch at StartupJust like Windows XP, Vista ships with all kinds of services enabled that load at startup and may never be used by most users.To see what loads at startup and disable the ones you likely won’t be needing (they can always be started manually later):* Click Start then Control Panel* Select Administrative Tools* Choose System Configuration* Click the Services Tab* You can safely deselect:– Offline Files (unless you’re using Offline File Sync)– Tablet PC Input Service (unless you have a tablet PC)– Terminal Services– Windows Search (If you have already disabled indexing)– Fax (unless you’re using a fax modem)
10. Disable Excess Windows FeaturesWindows ships with other features that are listed separately in the Vista operating system from the startup services.You can view and disable these features by:* Clicking Start then Control Panel* Select Program Features* On the left panel, select Turn Windows Features on or off* You can safely deselect:– Indexing Service– Remote Differential Compression– Tablet PC Optional Components– Windows DFS Replication Service– Windows Fax & Scan (unless you use a modem for faxing)– Windows Meeting Space (unless you use the Live Meeting Service)

It sounds as though your computers hibernation feature is malfunctioning, or your power setting are set to shut your computer off. If I were you I would attempt to disable both features, Go to Start in the bottom left, click on Control Panel in the Start menu, and then go to Power Options. Basically just tell it to never shut off any hard disks or the computer.

1. Turn off Windows Search IndexingWindows Vista search indexing is constantly reviewing files on your system to make their contents available for quick searching. This is handy, but can severely impact system performance.To disable this constant indexing:

Click Start then ComputerRight Click the C: DriveOn General Tab, Uncheck Index this drive for faster searchingOn the subsequent dialog box, Select Include subfolders and files

2. Turn off Remote Differential CompressionRemote Differential Compression measures the changes in files over a network to transfer them with minimal bandwidth rather than transferring an entire file that has previously been moved. By constantly checking for file changes, this service can hinder system performance.To disable this service:

Open Control PanelSwitch to Classic ViewSelect Program FeaturesChoose Turn Windows features on and offScroll down and uncheck Remote Differential Compression

Open Control PanelSelect Windows DefenderChoose Tools from the top menuSelect OptionsUncheck Auto Start at the bottom of the window

5. Turn off Automatic Disk DefragmentationWindows Vista and its always-on defragment feature isn't really that necessary and can cause system slow down. Just remember to run a defrag manually every week or so.To disable this:

Click Start then ComputerRight Click the C: DriveSelect the Tools TabUncheck Run on a schedule

6. Add a 2GB or higher USB Flash drive to take advantage of Windows Ready Boost (Additional Memory Cache)Ready Boost is Microsoft's name for using a USB thumb/flash drive to provide some quick access memory the operating system can use as extra RAM. The Ready Boost system can significantly improve system performance.To set this up:

Insert a USB Flash Drive (preferably 2GB or more)Click Start then ComputerRight Click the USB Drive in My ComputerSelect the Ready Boost TabChoose Use this deviceSelect as much space as you can free up for RAM usage vs. Storage

7. Turn off Windows HibernationWindows hibernation background services can use a large amount of system resources. If you don't use the Hibernate feature on a regular basis you may want to disable it to give Vista a performance boost.To disable Hibernation:

Select the Control Panel then Power OptionsClick Change Plan SettingsClick on Change Advanced Power SettingsExpand the Sleep selectionExpand the Hibernate After selectionCrank the selector down to zeroClick Apply

8. Turn off System RestoreAnalysis and restore point creation by Windows Vista can eat a fair amount of system resources. Disabling this service will obviously mean the system restore feature in Vista will not be available in the event of a system crash. Change this at your own risk.

Control Panel>SystemClick System Protection on the left panelUncheck the main system driveAgree to the confirmation

9. Disable User Access Control (UAC)

10. Disable excess Windows Services that Auto-Launch at StartupJust like Windows XP, Vista ships with all kinds of services enabled that load at startup and may never be used by most users.To see what loads at startup and disable the ones you likely won't be needing (they can always be started manually later):

Click Start then Control PanelSelect Administrative ToolsChoose System ConfigurationClick the Services TabYou can safely deselect:Offline Files (unless you're using Offline File Sync)Tablet PC Input Service (unless you have a tablet PC)Terminal ServicesWindows Search (If you have already disabled indexing)Fax (unless you're using a fax modem)

11. Disable Excess Windows FeaturesWindows ships with other features that are listed separately in the Vista operating system from the startup services.You can view and disable these features by:

Clicking Start then Control PanelSelect Program FeaturesOn the left panel, select Turn Windows Features on or offYou can safely deselect:Indexing ServiceRemote Differential CompressionIKE and AuthIP IPsec Keying Modules (Disable) VPN service stuffIP Helper (Disable) Until IPV6 is commonly being used----it's worthlessIPsec Policy Agent (Disable) Not many Internet Providers require this---mine doesn't.KtmRm for Distributed Transaction Coordinator (Disable) High level networkingRemote Registry (Disable) I really don't want someone else in my Registry, remotely!Secondary Logon (Disable) No need----I'm the only logon----ever!Security Center (Disable) No need if you are running another Security ProgramTablet PC Optional ComponentsTablet PC Input Service (Disable) I don't have a tablet PC!Windows Error Reporting Service (Disable) I don't want to inform MS of errors.Windows Media Center Extender Service (Disable) Unless you hook to an X-Box.Windows DFS Replication ServiceWindows Fax & Scan (unless you use a modem for faxing)Windows Meeting Space (unless you use the Live Meeting Service)Windows Firewall (As long as you are running another Firewall)Windows Search (If you never search the internet without your browser)

12. Stop Security NotificationsYou must do this BEFORE you disable the Security Center Service. In the Notification Area which I call systray (bottom-right where the time is), right-click on the Security Shield and choose Open Security Center. On the left choose Change the way Security Center alerts me, then choose Don't notify me and don't display the icon. The shield will disappear.

13. Disable Windows Vista Sidebar and prevent it from running at Start-upRight-click in the Sidebar area and choose Properties. Then uncheck Start Sidebar when Windows starts. If you want it back for some reason---You can start it any time by simply typing "sidebar" in the search bar of the start menu. This one is a big memory user and WILL slow things down on a normal machine. I found it fairly useless.

14. Speedup Start Menu SearchStart Menu Orb >>>>Run>>>>type in regeditHKEY_CURRENT_USER/Software/Microsoft/Windows/CurrentVersion/Explorer/Advanced.Find and right click on Start_SearchFiles and select Modify. Set the Value to 0.Don't reboot yet till you have done Step 6

15. Speedup Menu DisplayStart Menu Orb >>>>Run>>>>type in regeditHKEY_CURRENT_USER/Control Panel/DesktopSelect MenuShowDelay from the settings on the rightSet Value to 200 (I find 0 way to fast...)Reboot

16. Do an Advanced Disk CleanupStart Menu Orb >>>>>Run, type: cleanmgr /sageset:50Select the options you want, I think it is fine to choose them all. Click OK and close out the window. (there is a space between the r and the /)Start Menu Orb >>>>>Run, type: cleanmgr /sagerun:50 (there is a space between the r and the /)

To automatically put your computer into hibernation
You must be logged on to your computer with an owner account in order to complete this procedure.

1. Open Power Options in Control Panel. (Click Start, click Control Panel, and then double-click Power Options.)

2. Click the Hibernate tab, select the Enable hibernate support check box, and then click Apply.
If the Hibernate tab is unavailable, your computer does not support this feature.

vista

Go to the command prompt icon in the Start menu under Accessories and right click the icon: click "Run as administrator".
Paste: "powercfg.exe /hibernate on" and hit Enter and also paste "powercfg -h on" and hit enter just to be safe.
Open Control Panel and type in "Hibernate" in the Search.
Click "Turn hibernation on or off"
Click "Change advance power settings"
Scroll to and expand the "Sleep" option.
Select "Off" to the "Allow hybrid sleep" option.
Scroll to and expand the "Power buttons and lid" option.
Select "Hibernate" for the "Sleep button action" option. 10. Select "Hibernate" for the "Start menu power button" option.

windows 7

Click the Start button, and then click the arrow next to the Shut down button.

Sleep and Hibernate located on the menu

If sleep or hibernate aren't available, it might be for one or more of the following reasons:

Some laptops
have issues with Windows XPs hibernation mode. To get the computer back
up again you should just hold the power button down until it shuts off
completely. Some laptops won’t shut off even if you do this. When this
happens you have to take the battery out to get it to turn off. Make
sure it is not plugged into the wall when you do this otherwise it wont
work.

Once you get the computer back running again you may
want to disable hibernation if it seems like its going to keep
happening. Go to Start, Settings Control Panel or Start, Control Panel
and go to the Power Options icon. Change the hibernation section to
never. You may want to try standby as an alternative. Standby saves all
your running applications and documents into RAM while hibernate saves
them to the hard drive. Hibernate uses less power from your battery,
but it will take you considerably longer to get the computer back up.
If you always plug the computer in then you may want to disable standby
and hibernate since you really dint need them while plugged in.

Disable hibernation in the power settings. I've run across many computers that do not respond properly to hibernation mode, and that do the same thing. It's easier to simply disable hibernation mode and have it fall into sleep mode instead.