So confused

blakka

blakka

blakka

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Joined
1 May 2004
Posts
365
Location
Essex
Ok here goes.

Currently I have a S939 setup. I have been running this setup for around two years with no hardware problems what so ever. Recently I purchased a Motherboard, Ram & CPU from the MM as I fancied an upgrade. :)

The new gear turned up on Friday and so i removed my trusty old Motherboard, CPU & Ram in favour for the new parts. Once I had installed the new parts I proceeded to turn on the PC.........no post. The PC gets power as all the fans are turning, the HDD's are spinning etc, however the PC wouldn't post. As the PC refused to post I assumed I had not connected something correctly so I reseated all the components and ensured that all connections were correct but still........no post. I then assumed that maybe one of the new parts I received from the MM was broken, until I noticed two red led lights lit up on my 1800XT GPU which state T_fault & Ext Pwr. I then assumed that the graphics card was dead which would explain why there was no display/no post.

I then tried the GPU in a friends PC, it worked no problem. I then tried the new memory I received from the MM in his PC, it also worked no problem. I then tried using my friend's Corsair HX520W PSU in an attempt to power my PC incase my PSU was the cause of my problem however my PC still refused to post, I then plugged his PSU back into his PC and it worked fine. I then used my PSU on his PC, it powered his PC with 8800GT fine. This leads me to believe that my PSU is not the cause of my PC's lack of posting.

So........ my GPU works, my new Ram works and my PSU works, The only components which have not been tested are the new CPU and new Motherboard. I then thought I would connect back up my trusty old S939 setup while i figure out what was causing my new setup (LGA775) not to post. I removed the new 775 Motherboard and replaced it with my old S939 Motherboard, Ram and CPU, however..........guess what.......... same problem............ IT WONT POST!!! :eek:

What the hell is going on! I'm tearing my hair out at the moment. If anyone can share any ideas as to why two different motherboards with two different CPU's and sets of Ram won't post I would be very grateful. I suspect that both Motherboards are broken, but what bother's me more is why have both Motherboards died, especally seeing that my old Motherboard was working fine the Friday morning before I attempted to fit the new hardware the Friday evening?

PS. I have tried powering both motherboards outside of the case as I thought they might be shorting out on the case, plus I have also tried clearing the CMOS and removing the Motherboard batteries on both Motherboards however the problem still remains, no post & no display. :(

Below I have listed the spec's of both my new and old rigs.

Old :-

CPU = S939 AMD Athlon San Diego 3700+
Motherboard = ASRock 939Dual-SATA2
Ram = Generic 3 x 512MB
GPU = ATI 1800XT 256MB
PSU = FSP Sparkle Blue Storm II (18A Rail)
Case = Thermaltake Mambo VC2000 Series

New :-

CPU = Intel Celeron 430 1.8GHZ
Motherboard = DFI Infinity 975X/G
Ram = 2 x Geil 1GB 800Mhz
GPU = ATI 1800XT 256MB
PSU = FSP Sparkle Blue Storm II (18A Rail)
Case = Thermaltake Mambo VC2000 Series
 
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well that is jus bozare everytghing i could think of you had allready trid as i read further on. i thought maybe power supply not enough for gfx but then realised you been using them together on y oru old system...wich now dont boot. i am stumped hope you get it sorted
 
Lol, i'm stumped too! I ordered another Motherboard from OcUK, when it arrives on Wednesday I will give that a try. Fingers crossed.
 
I have an issue like that with mine. To this day it still does it. I have found a work around which is the only thing I can think of that might, as a long shot, help you out.

On mine I have to use this procedure to boot
1. Turn on PC - no post
2. Turn off by holding in power button until it goes off
3. Turn off power switch onback of PSU
4. press power button on PC to discharge power in the PSU
5. Turn PSU switch back on
6. Start PC by power button

I have to do this every time, but once that is done it works fine, it can restart, its just if it actually powers down I have to do it again. You could give it a try...
 
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Bit basic, but are you sure you have all the power connections plugged in on the mobo, I know mine needs an extra 4 pin to power the processor which I hadnt expected, although this was with my first build when I was new to the whole world of the inside of a pc...

...anyway, just a thought!
 
Yes I made sure the extra 4-pin plug was connected the Motherboard. I tried with only the 20-pin plug and no joy, then I tried with the 20-pin + 4-pin, still refuses to post.
 
I will let you guys know what happens when the new Motherboard turns up tomorrow. I have a feeling both Motherboards are dead, god knows why.
 
been rubbing balloons on your hair lately? putting motherboards straight onto carpets? You tried booting without any of your hard drives or opticals plugged in? I've seen a hard drive shorting a board before.
 
been rubbing balloons on your hair lately? putting motherboards straight onto carpets?
Click to expand...
I did place one of the Motherboards on the bed while I dismantled the PC.

You tried booting without any of your hard drives or opticals plugged in? I've seen a hard drive shorting a board before.
Click to expand...

I have disconnected everything, DVD drives, HD drives, fans, etc. I even tried to boot with just the Motherboard, CPU, GPU, & PSU outside of the case but both Motherboards using different CPU's and Ram refuse to boot. I must have killed both Motherboards somehow, I need to find the cause as i'm afraid i'll kill the new Motherboard due to arrive.

When the new Motherboard arrives tomorrow, I am going to try properly grounding myself, then try powering up the Motherboard, CPU, & GPU outside of the case first.

Any tips on how to ground myself cheaply?
 
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Have you tried resetting CMOS? Have you tried building either of your motherboards on an (insulated) bench, to remove the possibility of a short circuit due to the case?
 
Make sure the plug is in the mains but make sure it is switched off.
Click to expand...

So make sure the plug is plugged into the back of the PSU, do I switch off the PSU from it's switch or do I switch the plug off from the mains wall socket?
 
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