Black Screen No BEEP good PSU

[NiceCold]

quick overview:
- press power button, everything run but monitor is black aka empty. NO BEEP.
- when power up, keyboard light blink then stop

ruled out
- changed thermal paste for cpu/heatsink...... reseated cpu also
- put ram each one and power up with each
- took all ram off and power up.... no beep
- took out video card
- took out pci sound blaster card
- unplug hdd plug then power up..... no beep
- took off cmos coin for 30min.... no work
- checked motherboard for fried marks and leak capacity.... all looks good
- bought brand new sealed ANTEC 380 GREEN to replace old psu
- changed psu cord
- put other monitor to the system and same black... nothing on screen
- google gazillions..... no solution



the signs start happending last year when the computer starts having trouble when boot up.... sometimes when power up it show black screen... then shut it down then power up again then it would work no problem. now finally it dont work at all. when power up it just everything runs but black monitor.... nothing on monitor

i am sure it is no loose wires or anything cause when it it finally wont boot with monitor at all..... the comp was in use then shut down to go somewhere then back then power up then its the time that it have black screen.... no beep... and cannot make it to work at all.

i google alot and some people got it to work but their problem was not exactly the same.... their situation turns out to be bad psu. but my psu is all good. please someone help!

 

[denis280]

HI! Give us more detail about you system. PSU. GPU. DRAM.HHD MOBO" and operating system WINDOWS (what?)

 

[supremor]

I just had the exact same thing happen to me all of a sudden. This sounds like a motherboard issue to me, just the fact you couldn't detect anything damaged on the board means nothing. If you can I suggest you try a different board, its either that or the CPU (unlikely but possible) since you ruled out the bad PSU option.

 

[Level_1]

Try reseat the cpu.

 

[NiceCold]

HI! Give us more detail about you system. PSU. GPU. DRAM.HHD MOBO" and operating system WINDOWS (what?)

its an emachines T6212 got from 2005

- athlon64 3200+
- 512mb stock.... current 2x 1gb plus 2x 512mb but read 2.5gb wonder why? do anyone know?
- 320gb hdd
- X850 XT
- antec 380 watt green
- soundblast live! basic 24bit card
- windows xp home 32bit

- motherboard? i dont know. i see its an red board and has ati logo silver round thing on the board.


@ level i did try reseat all the rams and different slots and tried 1 ram and still no work. (oh u said reseat cpu... haha..... well i did tried changing thermal paste while at it reseated cpu. still no work.

@ supreme i still not find solution.... i google gazillions and no solution. if i really cant fix i concidering buying new motherboard.

 

[denis280]

well to me look's like psu problem.when it dos'n post and no beep sond.

 

[supremor]

Don't think its the PSU personally, if it turns on (fans spin etc) then the PSU is most likely fine. The fact it wont POST or beep at all even when trying to boot with no RAM for example indicates the board is most likely dead. Now given how old the machine is it could be difficult finding a new board for it but you can always hit up ebay and hope you get lucky.

 

[KGB]

Take a close look at the MB capacitors.
Look for any bulging or burst ones. That board is about the right age.

 

[NiceCold]

Take a close look at the MB capacitors.
Look for any bulging or burst ones. That board is about the right age.

bulging.... what mean? you mean like bending? not straight up? sway to the side?

 

[supremor]

Assuming you know what a capacitor looks like, a good one should have a nice flat top. A bad cap would be bulging, its top would be convex instead of flat like a little dome of sorts... not sure how to explain it better.

 

[KGB]

bulging.... what mean? you mean like bending? not straight up? sway to the side?

Do a Google search for "badcaps".