dead motherboard....?

[neatfeatguy]

At least once a year after everyone goes to bed, I pull apart my tower and clean. Remove the gpu, fans and such....clean them all off, put it all together and things are fine and dandy.

This time the computer wouldn't power on. I rechecked all power cables, everything was plugged in and still no power.

I didn't remove the heatsink or even unplug the power cables on the motherboard. I verfied the power and reset pins were plugged into the board - they were. Still no power.

I unplugged all power cables from everything and did the paper clip test on the psu, it turns on. I removed the motherboard from the tower and set it on a cardboard box. Plugged in the psu power cables (24 pin + 8 pin), I powered on the psu and I got no response.

I grabbed my spare working psu. Paper clip test works. I plugged the spare psu into the motherboard and I still can't get the motherboard to power on. I tried with a screwdriver and the built in power button on the motherboard.

 

[Jetster]

No bios switch? Any chance you got some liquid somewhere? Reset the memory and CPU try again. Could be dead

When you bench test don't plug anything but a keyboard and monitor. Nothing else. So no drives
One time I used too much alcohol on the CPU and got some in the socket. No boot

 

[CAPSLOCKSTUCK]

take it all apart and start again.

 

[Caring1]

Is the post code lighting up when you power on?

 

[R-T-B]

Ouch. I don't have any advice per say, just sympathizing with what must be a frustrating situation...

 

[RCoon]

Is the post code lighting up when you power on?

This. Getting and LED lights at all on the MoBo?

 

[qubit]

@neatfeatguy Mobo short against the case maybe?

 

[jboydgolfer]

you didnt pull the jumper off did You?

 

[neatfeatguy]

No bios switch? Any chance you got some liquid somewhere? Reset the memory and CPU try again. Could be dead

When you bench test don't plug anything but a keyboard and monitor. Nothing else. So no drives
One time I used too much alcohol on the CPU and got some in the socket. No boot

I only took the fans and gpu out, cleans them off and put them back. I didn't touch the heatsink or cpu fan.

take it all apart and start again.

That's basically what I did. Everything came out. Only the MB and psu are plugged in while resting atop a cardboard box.

Is the post code lighting up when you power on?

This. Getting and LED lights at all on the MoBo?

Nothing. No LED code. I've pulled the CMOS battery as well and tried 2 psu, no lights on the MB.

@neatfeatguy Mobo short against the case maybe?

I don't how since she's out of the tower. This was my initial thought, but I don't get any response on the mb when she's out of the tower.

you didnt pull the jumper off did You?

No, nothing has been pulled, bent or damaged that I can tell from a visual inspection.

 

[qubit]

Ok, perhaps the mobo is dead then, unfortunately.

 

[JrockTech]

Sounds like it's dead. But what would cause no power to go through at all? The motherboard must have gotten damaged badly.

 

[P4-630]

Did the motherboard got an static electricity charge from yourself accidently?

 

[neatfeatguy]

Did the motherboard got an static electricity charge from yourself accidently?

I wouldn't think it did. I was barefoot and in shorts/t-shirt. Tower was sitting on top of the wooden table I was using.

Here's what I did last night after I turned the computer off to do some spring cleaning:
I powered off the computer.
I turned the PSU power switch off and pulled the power cable from it. I waited about 30 seconds and then started unplugging all other cables.
I took the case and set it on the wooden table. I removed the side panel and set it on the chair next to me. I removed the top grill and front grill to access fan screws.
I removed the fan filters on the case.
I took out 5 fans and the GPU (after disconnecting the power cables).
I took canned air and sprayed out the GPU and then using a small brush I cleaned off the fins on the fans and brushed off the heatsink on the GPU some (what I could reach without removing the shroud).
I brushed off the case fans.
I used canned air to blow out the fan filters.
I put the GPU back in, all fans back in and put all fan filters back. I checked to make sure everything was plugged back in with the appropriate power cables.
I moved the tower back to it's rightful location, plugged in the keyboard/mouse, monitors, speakers, printer, ethernet and PSU power cord. I flipped the power switch on the PSU and pressed the power button - no response.

Here's the steps I took for troubleshooting:
Unplugged everything from the I/O. I flipped the power switch on the PSU off. I unplugged and replugged the power cable on both ends, switch the PSU on, press button on the tower - no response.
I moved the tower back to the table and plugged the power cable into a different outlet - no response.
Thinking the MB may be shorting out somehow I unplugged everything from the MB. I only have the H100i, 1 stick of RAM and the PSU plugged in with the MB sitting on a cardboard box - no response. No LED.
Thinking maybe the PSU went dead I did the paperclip test - she turns on.
Just to be safe, I grabbed my spare 750W Seasonic 80 Gold and plugged her into the MB - no response.
I did the paperclip test on the Seasonic - powers up.

I've also removed the CMOS battery and put it back after about 20 minutes and tested again with both PSUs. I tried powering the MB on using a screw driver and using the onboard power button - no response on the MB. This is when I called it a night and crashed around 1:45am

Guess that goes to show I shouldn't try to keep my computer clean. I didn't do anything differently then I've done before in the past.....

 

[Caring1]

The only thing I can think of apart from static killing it, is possibly a short when you placed the GPU back in, one of the fingers may have bent in the slot.
Have you taken it out and checked in the PCI-e slot?

 

[neatfeatguy]

The only thing I can think of apart from static killing it, is possibly a short when you placed the GPU back in, one of the fingers may have bent in the slot.
Have you taken it out and checked in the PCI-e slot?

I can take a look when I get home, but that won't be for a while (curse work interfering with my need to fix my computer!).

 

[jboydgolfer]

did you flip the switch on the back of the Power supply? Half joking, but half not. no offense, i say it because its something i would do.

also, im not able to read through everything, but maybe try powering up with no CPU? worth a shot, if you havent tried it yet.

i hope it works out for You

 

[R-T-B]

did you flip the switch on the back of the Power supply?

lol, I have done this... I cannot lie.

 

[MrGenius]

You should at least try reseating the CPU. If you haven't yet.

 

[stinger608]

did you flip the switch on the back of the Power supply

I have to assume he did this as he stated that he tried the "paper clip" method of firing up a power supply.

I'll bet over just the last two years, I have responded to half a dozen tech calls and that was all that was wrong.

 

[jboydgolfer]

I have to assume he did this as he stated that he tried the "paper clip" method of firing up a power supply.

I'll bet over just the last two years, I have responded to half a dozen tech calls and that was all that was wrong.

Yeah, as i posted i couldnt read through all the thread, i was working,but its been the source of more than one issue in my exp.

Short of catastrophic physical fklures or damage i dont think i can recall a time that a mobo showed zero life.weird

 

[jaggerwild]

Remove the battery, move the jumper, leave it sit for 24 hours, put everything back, re try computer

 

[jboydgolfer]

after everyone goes to bed, I pull apart my tower and clean. Remove the gpu, fans and such....clean them all off,

i do this as well, but more frequently. something about doing it when all the noise makers have gone to sleep is Very peaceful

 

[neatfeatguy]

To try and satisfy my curiosity, I picked up a new mb at micro center.

I took the spare pc that works. It powers up to Windows (vista, baby!). I connected the psu to the new mb and it gets no power. The LED code doesn't come on. I also connected a couple of fans to the power supply as well to see if they get power when the new mb is connected....nope, they don't spin. Everything is on a box, too. I connected the psu back to the spare computer and she boots....

 

[neatfeatguy]

Forgive the double post....using my phone....

I took the psu from my build that's not working and hooked it up to the spare pc andshe starts right up....

Think maybe I got a doa mb?

 

[OneMoar]

do you get no power from the board at all ?

check and make sure the clr cmos jumper isn't shorted some-boards wont do anything with the clr cmos jumper enabled if your board has a reset button for that check that as well as well as any and all other jumpers
make sure the power switch polarity is correct,try bridging the pins with a shiny screw driver (yea I know switch polarity lolwat but I have seen some boards no cooperate)