Hi,

I am using an Nvidia motherboard with AMD processor. I have Windows XP operating system. My computer is not recovering from standby.  It does not start even when I switch the  CPU  power ON/OFF and try restarting or starting it. There is no light on the CPU, though the monitor light blinks which is powered by the same power source.

Please suggest. Are there any test  - like opening the CPU and checking for some voltage which can tell me what is wrong with it?

Thank you. I will appreciate any suggestion.

NehaCheck your cables.... Also MAKE SURE your cards seat well in their slot... Also check your power cords..Hi,

I just opened d CPU and powered the conputer on... After this we checked the SMPS output and it gave 0.5 V on one pin and 0 on other.

 
One afternoon I had put the computer on stand by (which is rare) and then after an hour or so the computer did not start at all.


Thanks so MUCH for your replyHave you made any changes prior to this? aside from putting it on stand by... hardware/software installation? and also could you give us your specs...hardware and software... Please include PSU ratings and OS.. Other members might need it...

Thanks!! first thing, this is a CPU and this is a computer.

secondly, we will need computer specs. such as the make/model of PSU.Standby has been known to be very unstable and have issues coming out of standby mode.Hi,

So, it is a computer which I powered ON. The make of the PSU is :

ZEBRONIC - ATX Switching power supply
Model : LC B400ATX

I/P V 115~ , 230~  I  10 A, 6 A , Freq 60 - 50 Hz

The mother board in use is of Zesus and graphics card from nvidia . It is an AMD 64 processor.There were no software , hardware changes prior to putting it on stand-by. Though I do suspect virus from pendrive.Borrow a known good PSU of the same wattage or greater and swap it in there to see if that's the culprit...
As always when working inside the case remove all power sources and take anti-static precautions...Hi ,

This is what I did :

I have another computer of exactly the same make. I exchanged the PSU of the two and observed that in the computer which is working fine - an LED is on (located on the mother board) when I press the start buttom. But this doesnt happen in the computer not working.

I also checked the power coming on the ports when computer was started (using start buttom) . In the one that is working fine, the power supply shows 5V adn 12 V as expected. But in the one not working the voltage is like 0.5V and 0V.

Also when the PSU is powered on and the computer not switched on , the sockets coming out of the PSU show no voltage as expected. So I understand that the motherboard gives a trigger to the PSU to start supplying power.


So, my question is that - is the fault in motherboard?

If yes then the malfunctioning is due to software or hardware?

I left the computer on stadnby for an hour and then it did not start. Can any virus stop the computer to SEND this trigger?

Thanks.Hi Everybody,

I really need to repair my computer. Please help. Thanks a lot.

Neha Quote from: Betaa on March 18, 2008, 04:54:11 PM

Standby has been known to be very unstable and have issues coming out of standby mode.