Samsung S3 I9300 no recovery no boot and odin fails to flash I have Samsung S3 GT-I9300

It was working fine but suddenly, I turned it on and it is stuck on the Samsung LOGO forever. It doesn't go to recovery mode when pressing HOME+VOL UP+POWER. 
But I can still go to Download mode. However, Odin fails to install CWM and TWRP or official recovery 

I tried to install Bootloader_XXELLA_Odin.tar via odin but it failed and now I start getting this message:


  Firmware upgrade encountered an issue. Please select recovery mode in keys and try again


I can still go to download mode, what I can try now? Please if you have an answer be specific, or if you suggest flashing a boot-loader I would appreciate providing a single link (not a page with bunch of links).

Update

Now the problem is worse, I tried again to install CWM via odin after I disabled antivirus (thinking it maybe the cause). But the install failed again, and the phone is completely dead! It shows NO sign of life. No light, nothing.
What were you actually doing with your Phone? Did you try to install custom ROM/Recovery/Kernel/Mod and so on?

I too have S3 GT-i9300 which is working fine after replacing my motherboard because I came across Sudden Death Syndrome (SDS) in S3.


If you are able to go to download mode then download the latest Stock version of S3 which is 4.3 JellyBean and flash it via latest odin.
Make sure USB Debugging is ON in your phone and your phone driver must be installed correctly.
You may use this link to download driver for Samsung Mobile. 
Make sure before installing this software all the other previous/old driver are uninstalled.
I would recommend that you should try to ADB to see your phone has proper drivers installed. Just Google ADB and download it. (Put all the files in one folder named adb.)
Press +R to open Run. In it type cmd. Now Command Prompt should have started. (I assume that you put the folder adb in root of C: drive) Type the following commands.


cd &lt;space&gt; / - this will take you to root of C: drive
cd adb - this will take you in adb folder.
adb devices - this command will show all the devices currently attached to your system.

If you can't find any device then it means drivers are not properly installed.



Try it, hope this may help you.