shorted capacitors around the apu
hi there, 
i am currently attempting a repair on an original ps4. seemed like a blod at first. since it would beep, give a blue light and turn off immediately. on a second start there wouldn’t even be a blue light, but just the beep. 
i went ahead and checked the capacitors on the mb. just for check…
last update: 
the ps4 is now working properly! 
the problems were a shorted capacitor on the backside of the board leading to the power management ic, as well as the control pin for the power supply 5v connector not being soldered on properly. i found flux residue around that connector and checked i…
problem is a bad capacitor on the power board. caution if repairing yourself as capacitors in tv's hold a charge long after set is powered off and can be lethal. 
  
 when looking at your power board for a bad cap look at the top of the capacitors. a bad cap will have a noticable "bulging" on the top of it compared to others. be sure to note polarity of capacitor (will have a "-" on one side indicating negative. to fix on/off issue simply unsoldered bad capacitor and solder in a new one with same voltage and capacitance rating being sure the new capacitor is oriented the same as the old one was before it was removed. have added psu to above post. (i added specs because i knew someone would ask. however i think it's a software issue.)

unlikely that it's the psu.

the current psu is a hx750i, and the previous psu was a hx650i. swapped over a year ago at least. this is a recent issue.


good, a lot of times this is the psu. but with an excellent unit, that's far less likely.

were you monitoring temperatures at the time? was there something specific you were doing similar in both times? really intermittent things can be hard to nail down. hi everyone, just to close this topic, i could get a proper power supply and in fact it was the problem..

thaks everyone for your time and help ! Hello guys  
  
I had the same problem. My LCD ViewSonic VX 924 has been blinking   
  
For repar it i changed the following capacitors : 100uF/400v  
330uF/25v and 330uF/35v   
  
if that always flickers you can also change the two 470uF/25v capacitors  
The link for a pic Alime and Capacitors   
http://img25.imageshack.us/my.php?image=alimefsp0351pi01.jpg  
  
DO NOT TOUCH NOTHING D'OTHERS ANS DISCONNECT ELECTRICITY CABLE BEFORE PROCEEDING only thing i can think of is to maybe reflash the firmware. It could be a problem with static discharge , if so do the following.


1. Disconect the power cord


2. Remove the battery


3. Hold down the power button for 30 seconds , then release for 30 sec and then hold down for another 30sec


4. Plug in power ,replace battery and power on laptop.


If this causes no Joy try this.


Remove memory and reinstall one stick at a time, if there are more than 1 dimm of ram, try each stick in each slot one at a time to see if the memory is ok and to determine if one of the memory slots is bad.


Hope this helps Strangely, the problem is seems to be solved now.

I reorganized the ram (4 x 8gb) and the three beeps are gone. The system wakes up from s3 sleep normally.




[View solution in original post](/t5/Intel-Desktop-Boards/S3-Sleep-Mode-Issue-W2600CR2/m-p/280106#M16903) thanks, to all of you for the replies, after much trial and error turns out the culprit was the PSU. Amazingly one of the modular plugs had a dead terminal and was not giving power thru the cord, I tried another one of them and boom, GPU read. Seems like GPU was receiving only half the power it needed to fully be operative. With one plug it did turn on and fan blew but it was not functional until the second plug gave the rest of the power. Rediculous lol Thanks all who replied, never even thought of trying another terminal until i started trying to do stupid random things. Now to send back this damn PSU lol




[View solution in original post](/t5/Intel-Desktop-Boards/DX79SR-Board-not-detecting-EVGA-GTX-680-Classified-GPU-on-first/m-p/256500#M12447) **bleep**… it was the powerline… duh! > Hello. I have an HP Pavilion 4500 laptop and it won't turn on. I've tried everything to get it to turn back on. There are no flashes or beeps or anything when I hit the power button. Also, before all this came up, my charger wasn't charging correctly. It would turn on then turn off repeatedly. Then one day, my laptop shut off and didn't come back on anymore. I haven't been on my laptop in about 4-5 months now. Could someone please tell me what might be wrong with my laptop?
> 
> 
> Thank you so much! :D
> 
> 


you havent used it in almost half a year!!!! get yourself a correct charging unit for it that works properly and charge it. leave it out in a warm spot for a day before hand though. it sounds like its gotten very cold internally and also all the battery power has seeped away to nothing. this happens with rechargable batteries after a while. of course you wont get anything when you've got a dead battery. sounds like the charger you have already may be defective or your current battery is defective at least.  

At the other end of the scale though it could be that you laptops power supply unit has become defective and maybe that has blown.  

Rule out the simplest options first of it being the charger or battery. if theres no joy take it down to a local computer engineer and get them to have a look. be prepared to spend a little dosh on it.



btw what r your laptop specs?? might help us.:D