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Windows 7: Mobo failure?

13 Dec 2012   #1
gregrocker

 
Mobo failure?

Nothing on screen at all. Fans power up as well as power button light, but no LED on mobo (not sure there ever was).

Tried new monitor, Power Supply: same.

Removing RAM and everything else except CPU and onboard GPU chip generates no beeps.

It's an older HP Walmart special so no real value but want to use it as practice for trying everything possible to get it working.


My System SpecsSystem Spec
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13 Dec 2012   #2
essenbe

Windows 7 Enterprise X64/Windows 10 Enterprise X64/Windows 10 Pro X64/Linux Mint
 
 

Sounds like it could be, Greg. With no ram the board should beep, a lot. To me that's a good indication there is a serious problem with the board.
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13 Dec 2012   #3
ICIT2LOL

Desk1 7 Home Prem / Desk2 10 Pro / Main lap Asus ROG 10 Pro 2 laptop Toshiba 7 Pro Asus P2520 7 & 10
 
 

Hiyya Greg PSU? perhaps? try another mate nothing to lose.

Plus it could be just the 24 pin connection have a look around the base where it is soldered into the board any burn marks and chaeck the caps out too - blown tops ooze coming out etc.

No use just measuring the volts mate as they might be there but no current. Had one recently like that in my tester - just replaced the PSU and away it went.
My System SpecsSystem Spec
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13 Dec 2012   #4
TVeblen

Microsoft Community Contributor Award Recipient

Windows 7 64 Bit Home Premium SP1
 
 

Could be. Although there are some very cheap machines that do not give beep codes on errors. Or you need to connect a piezo speaker to the Speaker leads to get the beeps.

Always a good idea to check (use another) video cable.
And do a ClearCMOS.
My System SpecsSystem Spec
13 Dec 2012   #5
ICIT2LOL

Desk1 7 Home Prem / Desk2 10 Pro / Main lap Asus ROG 10 Pro 2 laptop Toshiba 7 Pro Asus P2520 7 & 10
 
 

Hum I meant to say if you have a meter with the 24 pin plugged in try the power at USB headers for example or the soft on switch pins.
My System SpecsSystem Spec
13 Dec 2012   #6
gregrocker

 

Thanks, hardware dudes!

Caps smooth. Tried another PSU, same. Pulled CMOS battery for an hour.

Interesting you mention USB because it had lost USB functionality and was rebooting to reinstall driver when it crapped out. Where are these USB headers you speak of, and how do I test them with multi-meter?

Also does onboard video chip (where?) have a cable?

Looking around for speaker without USB power now.
My System SpecsSystem Spec
13 Dec 2012   #7
ICIT2LOL

Desk1 7 Home Prem / Desk2 10 Pro / Main lap Asus ROG 10 Pro 2 laptop Toshiba 7 Pro Asus P2520 7 & 10
 
 

Just use the black to a ground and touch each pin in turn some are just data but you know that I will have a look to see what config the pins are in but you should find some with power - should read up 5 volts.

Just found this http://www.directron.com/installusb.html
My System SpecsSystem Spec
13 Dec 2012   #8
ICIT2LOL

Desk1 7 Home Prem / Desk2 10 Pro / Main lap Asus ROG 10 Pro 2 laptop Toshiba 7 Pro Asus P2520 7 & 10
 
 

Oh Greg I should have said to mate test test continuity of the ground pin to ground ( the resistance side).
My System SpecsSystem Spec
13 Dec 2012   #9
gregrocker

 

How do I locate these pins you speak of on the mobo? General area?

I see the cable running to the front USB port which never really worked, but the rear ones are encased in alum. housing also on mobo.

Also what are these USB readings telling me?
My System SpecsSystem Spec
13 Dec 2012   #10
ICIT2LOL

Desk1 7 Home Prem / Desk2 10 Pro / Main lap Asus ROG 10 Pro 2 laptop Toshiba 7 Pro Asus P2520 7 & 10
 
 

No mate they usually are on the edge of the board in line with the main power switch and HDD light connector block see pic they can be all sorts of colours just look for the ones that have nine pins to correspond to that plug with the nine sockets and one blanked off spot.

My board shot just happen to be sorting mine out


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