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dead mobo?

By tyson44 ·
i turn the power on.. fans and cpu run... 15-20 seconds later hard drives go on... bios not loading, no beeps, no display... help?!

system was running previously no problems (i wouldnt say no problems, well it ran)

Abit ka7-100 mobo
AMD k7-950mhz
512MB memory
ATI all in wonder Radeon video
20GB and 100GB WD drives
SB live! 5.1 sound
winXP

removed all devices ran with just different video card and memory.. same result

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dead mobo?

by tyson44 In reply to dead mobo?

same memory just different video card

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dead mobo?

by opatzg In reply to dead mobo?

Try swapping out the ram with other known good ram o rif your 512 is 2 memory cards limit it to one, after that your down to motherboard/cpu. Good Luck

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dead mobo?

by tyson44 In reply to dead mobo?

not the ram...

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dead mobo?

by maddiuex In reply to dead mobo?

Couple things, Could be Power supply or processor. Just had 2 computers that done the sam ething and one was the Power supply and the other was the Processor. can check the Heat sink thermal pad or grease to make sure it was cooling?

Hope this helps

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dead mobo?

by tyson44 In reply to dead mobo?

Poster rated this answer

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dead mobo?

by Ann777 In reply to dead mobo?

If you haven't made any software or hardware changes and this has just started happening out of the blue... Then power off the computer, open the case and remove/reseat all cables, RAM, daughterboards, etc. Power it back up and see if all is well again.

? Are you getting the power light from the monitor? If not, try another monitor and see if that resolves the whole issue. If you do get the green light from the monitor power -- try another monitor anyway (sometimes video goes out with full power working). If it's an orange light from the monitor (or yellow), then check the video cable and make sure it's secure as well. Video not displaying are usually the monitor (not the video card).

If all else fails, then yes, replace the systemboard.

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dead mobo?

by tyson44 In reply to dead mobo?

Poster rated this answer

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dead mobo?

by CG IT In reply to dead mobo?

here is a quick rundown on POST.
1.Power on
2.Chipset initialization
3.Memory test
4.BIOS to Ram
5.Keyboard initialization
6.Test VGA BIOS
7.Processor Initialization
8.Real Time Clock
9.Video interface
10.BIOS sign on
11.Test base & extended memory
12.assign ISA resources
13.Initialize HHD
14.Initialize floppy
15.Boot attempt
16.O/S boot

This is just a basic and is not always the same for each BIOS.[a little more added here, a little less there, depends on the BIOS mfg and motherboard mfg. Most new model BIOS's are semi custom to the motherboard.]

Since you get to HHD initiazliation [you state that your HDD goes on] you might have a BIOS to MBR boot attempt hand off problem[possibly a MBR corruption on the HDD]. BUT,you should SEE something on your monitor during POST. Either the POST screen or Logo screen. If there is no signal output from the vid card [either the monitor data cable isn't connected or the vid card is toat, you should see a No Signal window on the monitor.

Another way to check POST is to watch the keyboard. The Number lock, caps lock and scroll lock lights will flash IF the BIOS is actually going through POST.

If you tried to Flash the BIOS and there was an oopps during the flashingprocess, that could be your problem and you will have to reflash the bios.

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dead mobo?

by CG IT In reply to dead mobo?

note: if you don't see the num lock etc flash,[assuming the keyboard is plugged in] then that narrows down the field of problems to BIOS POST 1 thru 4.

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dead mobo?

by CG IT In reply to dead mobo?

another note: some times during the POST the BIOS halts without any beep codes, or will continue to run even if there are errors [such as no keyboard] and not provide a beep code. The BIOS has a setting for halt that can be customized. Halt on all errors, Halt on all but keyboard, No hault, etc. again, that's the little more or little less I was talking about in the semi custom BIOS's for motherboard manufacturer. Most BIOS manufacturer's [Award, AMI, Phoenix]will state [if you visit their web site] that you should go to the motherboard manufacturer for BIOS updates as BIOS's are customized for the motherboard mfg.

Without an actual POST card to plug in and actually be able to watch the POST step by step, determining what actually is wrong is trial & error by removing componets and replacing with known good componets.

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