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Do I have a dead motherboard? No beep, no BIOS screen. - Page 2

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compdude61   09-18-2009 at 03:16:15 AM
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Last message on previous page:
:( Well amoebaman It looks as though for starters the mobo may be ok.
You might want to reset the bios if you know how to do that.
Then try a new PSU then post back.
Oh! You might want to give us your machine specs & if it has a PCI graphics card, list that as well.
Do you pay alot of high graphics games on it?
Thats where the graphics card comes in to play.
David :)


Message edited by compdude61 on 09-18-2009 at 03:24:03 AM
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Anonymous   09-26-2009 at 04:00:11 PM
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I had a the same problem as OP. I was playing I game the PC froze and when I tried to reboot nothing. No boot beep, no sound, no video, no usb power. It pretty safe to say the mobo died. Most likely the SB chip burned. It was a fine setup for the time it run. No major problems, no BSOD or reboots. Even had it ran for 6-7 months with no reboot, constantly. Oh well, RIP.

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Anonymous   09-26-2009 at 04:02:22 PM
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Power on problems on this mother board are usually cause of bad memory timing or failed oc. The mobo is very buggy.

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Anonymous   10-01-2009 at 04:01:59 AM
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To the guy who had the motherboard that was beeping and wouldn't stop: Amoebaman, if you had read the posts here like you claim you would understand that the fact that you haven't tested your power supply means that you shouldn't replace it. More than likely since your board is beeping at a set frequency it's a RAM issue. I hope you didn't just run and spend money on a PS without getting a cheap tester and testing your old one first.

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Mpc2323   10-07-2009 at 05:33:45 AM
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Attn:Westom


My assembled pc stopped working after 4 months of use. Same symptoms from the Op. I will learn how to test the psu using multimeter and post the numbers ASAP. One thing I noticed about the hdd, when I power up, i hear this clicking or short continous beep coming from the hdd. Im certain that it was not a post beep code because my mobo doesnt have speaker and my pc case doesnt have it either. I hope to hear from you soon

ty


Ps. It's hard enough posting through iphone. Please ignore my grammar!!!

Message quoted 1 times
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westom   10-09-2009 at 01:59:25 AM
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Mpc2323 wrote :

One thing I noticed about the hdd, when I power up, i hear this clicking or short continous beep coming from the hdd. Im certain that it was not a post beep code because my mobo doesnt have speaker and my pc case doesnt have it either.


Disk drive contains its own computer. That computer has two inputs - power and messages on the data cable. Why the clicking? Well low or unstable power means the computer keeps going and coming out of power off mode. The only way that hard drive computer knows of power off - when voltage drop too low.

Meanwhile, this was the procedure to get a useful reply about the entire power supply 'system': Measure (and report to three significant digits) voltage on the purple wire where that wire connect to motherboard (push probe inside the nylon connector).

Also measure voltage on the green and gray wires both before and when power switch is pressed. Report those numbers and behavior as switch is pressed.

I expect these numbers to remain constant at zero. However these numbers are also important. Measure voltages on any one of orange, red, and yellow wires as the switch is pressed.

Every measurement is performed without disconnecting or removing anything. Anything disconnected or removed makes analysis difficult. Simply touch probes to the wires (ie inside the nylon connector). Then read numbers. When you press the switch and computer does not power - still measure as if the computer powered on.

Message quoted 1 times
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Anonymous   10-12-2009 at 08:20:06 PM
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when u turn on computer their is 4 light on front check how many r on
or off go to manual and get idea what is wrong

Reply to Anonymous
ian-k   10-17-2009 at 07:30:38 PM
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westom wrote :

Disk drive contains its own computer. That computer has two inputs - power and messages on the data cable. Why the clicking? Well low or unstable power means the computer keeps going and coming out of power off mode. The only way that hard drive computer knows of power off - when voltage drop too low.

Meanwhile, this was the procedure to get a useful reply about the entire power supply 'system': Measure (and report to three significant digits) voltage on the purple wire where that wire connect to motherboard (push probe inside the nylon connector).

Also measure voltage on the green and gray wires both before and when power switch is pressed. Report those numbers and behavior as switch is pressed.

I expect these numbers to remain constant at zero. However these numbers are also important. Measure voltages on any one of orange, red, and yellow wires as the switch is pressed.

Every measurement is performed without disconnecting or removing anything. Anything disconnected or removed makes analysis difficult. Simply touch probes to the wires (ie inside the nylon connector). Then read numbers. When you press the switch and computer does not power - still measure as if the computer powered on.




test

Reply to ian-k
ian-k   10-17-2009 at 07:48:51 PM
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hey everyone I,m another. key things with me are as soon as i plug in it turns on then a quick touch to the power button turns it off instantly(almost seems backward). then it will not turn back on. i have to unplug it and plug it back in and even then it seems to have to reset before it will power on. oh ya basically same issues no monitor response(no bios), fans firing up though. I am willing to test(give the numbers) but i haven't flashed the bios yet. i was wandering if anyone has heard of these symtoms and what would be resetting? should i try and flash bios, or test wattage? i do have about 6 or 7 comps. sitting around and i've gutted mixed &macthed all of them and am not scared of the challenge but i still have yet to flash a bios(i've tried the cheasy way with the battery but don't think thats the same as jumping it) so thats why i wasn't quik to it.

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Ameen07   11-01-2009 at 05:55:34 AM
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Did you all try to change your power supply?? I suggest you change it.. :bounce:

Reply to Ameen07
GordonSoul   11-02-2009 at 04:28:31 PM
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Apologies for any lack of etiquette, being new to the forum.
I've read through the read with a view to whether it could give me any pointers as to whether it is worth persevering with trying to get my daughter's old system running.
It's been in the garage for quite a few months, supposedly dead.

I've dragged it out with a view to replacing the motherboard (and PC/RAM if they are also dead) but thought I'd fire it up and see what happens.

Well I do get a bit of life from it. The CPU fan powers up, the fan on the video card fires up but I get nothing else (although if I attach an old IDE HDD, I can hear it spinning).
I would have liked to just plug a VGA monitor in but as there is no VGA I/F, I've had to borrow the screen from my mac which does have DVI. Alas, I get no BIOS screen and the keyboard does nothing - not even a a caps lock light.
Also have reset CMOS and checked the CMOS battery (but would expect that would have no effect on getting a BIOS screen)

Any ideas? Spec follows

Gigabyte GA-8NA- SLI Pro (P4 3.28MHz)
nvidia GeForce 7600 GT
Corsair VX450 PSU (new - apparently there were sparks coming out of the original PSU)


Many thanks

Gordon

Reply to GordonSoul
Anonymous   11-11-2009 at 11:19:35 AM
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Hi westom, please forgive my ignorance as I am not a hardware specialist.... but how do I test the voltage on the power supply? I have two computers that have the same symptoms, no post beeps, no bios, no video. Before I found this thread I tried changing out the power supply since I assumed that was the problem and yes you guess it since now I am here, this made no difference. So, I have a multimeter, with two probes. I have a power supply plugged into my motherboard etc. How do I make the measurements you ask for? I do not know which probe should touch what parts, and I don't want to make the problem worse. Thank you so much for any help.

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