PC Suddenly stopped posting?

AmDaMan

AmDaMan

AmDaMan

Soldato
Joined
18 Oct 2002
Posts
4,023
Location
Wellington, NZ
Hi,

My brother said he tried to change the keyboard on his setup and now it's stopped posting. The spec is:

Gigabye GA-G33M-S2
8800 GTS (BFG)
Core 2 Duo of some type
Antec 400w PSU
2 WD Digital HDD (only one plugged in)
NEC DVD-RW

Mildly OC'd

I find it odd how it's just stopped posting. It will turn on, but not display anything on screen through the 8800 or the onboard vga. So i'm starting to think it's the mobo? I've taken the battery out while starting it up to clear the cmos (as I can't find the clear cmos pins) ans taken the 8800 out and just tried to use the onboard, but still nothing.

No noises either but I don't think there's an onboard speaker on this PC. The keyboard turns the rig on if you press a key but it still doesn't display anything. If you just turn the PC on with the button though the lights don't light up on the keyboard?:confused:

So I guess it's the mobo but possibly the PSU? Is there anything else I can try?

Thanks.
 
Is the HDD still spinning? Easy to tell if thats dead or not.

Sounds like the motherboard more than the PSU. If the PSU's dead, then you simply get no power whatsoever (usually). Try re-seating the CPU HSF aswell.

Do you have any spare components (PSU, RAM, etc)?
 
The hdd still spins yeah, just odd how the mobo would die, it's less than a year old.

I'll try reseating the HSF.

How good is the mobo i've currently got and how much would an equivilent be? I've been out of the game a while.
 
AmDaMan said:
The hdd still spins yeah, just odd how the mobo would die, it's less than a year old.

I'll try reseating the HSF.

How good is the mobo i've currently got and how much would an equivilent be? I've been out of the game a while.
Click to expand...

I've got pretty much (or exactly) the same motherboard (Gigabyte G33 mATX) and it seems to be good, highly recommended on OCUK.

Thing is, we don't really know what your brother did when putting the new keyboard in (i.e. anything could have happened). I don't know how a keyboard installation could screw up a motherboard personally :)

You should be able to RMA that mboard (and get a relatively speedy turnaround). An equivalent would cost around £70. Try swapping the RAM though, i.e. booting with one stick installed and/or installing totally different sticks (i.e. PC-5300 rated sticks) I had to install one 5300 RAM stick to get my mobo to boot first time, then swapped it out for 2x 6400 800Mhz sticks.

EDIT:
Your issue isn't similar to this is it: http://forums.overclockers.co.uk/showthread.php?t=17947306
 
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Don't think I could RMA it as I don't have a receipt or anything.

I'm also unsure whether he unplugged it while the system was on or not? He just said he moved the base to plug it in, which is why I checked everything was seated right.

I've tried with RAM in different slots, same result, and it's not really similar to that link.

Cheers.
 
When my system stopped posting it was due to faulty RAM. This was 18 months after building it, it had been faultless and rock solid stable up until then. Then one morning it simply would not post, the case, mobo and GPU fans would spin up and that was it. Turns out the RAM had failed just like that - no warning. Nothing else was damaged. It was good RAM too - Crucial 10th anniversary on a 6300 @ 3.4 with the RAM running 1:1. Chucked in some new RAM and good as new.

So check with an old DDR2 stick before taking the mobo out!
 
Uh oh, already ordered a new mobo. How likely is it that 2 sticks would die though? Tried the two different sticks in different slots and also no ram and it was always the same.
 
Both of my sticks died together. I tried running each individually in different slots before borrowing someone else's test RAM and diagnosing the problem. It wasn't anything to do with the OC settings either - I did try the Crucials again once it had posted with the test RAM and I'd removed the OC - nothing. New RAM, reloaded the OC, all was good.

I guess you'd best hope it was your mobo now ;) Unfortunately I believe RAM is usually the first thing to go though...Good luck!
 
Well chaps it wasn't the mobo :( so not only have I got to try and get a refund for that i'll have to test some RAM from somewhere! :(
 
It wasn't the RAM either, just got an RMA from OCZ and it's still not working!!

Am I looking at the cpu? :(

The PSU makes a high pitched whine, even when the system has been turned off though. Is that strange to anyone else?
 
Exactly the same problem as me mate I switched my 4870 for a 4850 and now it wont display anything even though everything appears to be working. Even when I press they keyboard keys the lights turn on but as soon as I let go they turned back off again. It pretty much is exactly the same lol

Lights are on, fans spinning, cd drive working, hdd vibrating power supply sounding fine. I checked the ram and then the mobo still the same result.

Last time it happned though I simple unplugged the 20 ping and 8 pin mobo power supply cord and replugged them in. Somehow that got it working again. Although I yet have no idea why that seemed to fix it.

However now not even that works so i'm very clueless at the moment heh. Id try a new cpu see if that works as there really isnt anything else you can replace is there? lol
 
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Nope, I haven't tried the cpu yet though, could you try another PSU? That's the next step I think, but all the fans and hdd spin etc so it seems unlikely :(
 
you could have damaged the power supply try another and power up PC without keyboard just incase keyboard is faulty

I have seen a keyboard take out a PSU

PS. voltages will be there but will voltage drop on powering up PC
 
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