John
Member
Registered: 30th Jun 03
User status: Offline
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I have an nf7-m here that won't turn on.
Pc has worked fine for about a year and a half and on thursday it just woudln't turn on.
I've tried every other component so can't be them.
The red light is on showing the board has the 5v standby power.
When the 4 pin auxiliary connector is in but the main power connector isn't and I fire up the power supply the northbridge fan goes.
Any ideas, no visible signs of anything blowing up and I can only be annoyed trying so much with the multimeter.
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Steve
Premium Member
Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
User status: Offline
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if its dead, its dead usually, check the capacitors for bulging on the tops. Any that are bulging are blown and you can try and solder some replacements in if you like.
Usually its not worth fucking around wit hdead motherboards though.
take it youve tried resetting the bios? take the battery out for a minute and replace and try again.
Seen this fix a few apparently dead dell motherboards
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Cybermonkey
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Registered: 22nd Sep 02
Location: Sydney, Australia
User status: Offline
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can be a real simple explanation, something metallic (dust?) shorting on the board. give it a good brush with a non-nylon brush
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John
Member
Registered: 30th Jun 03
User status: Offline
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Tried all the usual stuff, good clean and no visible damage to any components.
Need to wait on a reply email about it and see how long the warranty is.
I'd rather not have to buy a new one.
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Steve
Premium Member
Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
User status: Offline
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and youve deffo changed the psu yeah?
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John
Member
Registered: 30th Jun 03
User status: Offline
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Yip tried everything.
I'll just need to see if they get back to me, if not buy a new board.
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PaulW
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Registered: 26th Jan 03
Location: Atherton, Greater Manchester
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you sure the cpu hasnt fried?? unless the PSU went pop-bang...
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John
Member
Registered: 30th Jun 03
User status: Offline
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I didn't see what happened or I'd have a better idea.
Wee cousins computer.
What I was told it just woudln't turn on one morning.
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Steve
Premium Member
Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
User status: Offline
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if the cpu had fried it would still fire up but start beeping, same if ram failed
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John
Member
Registered: 30th Jun 03
User status: Offline
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Everything else works.
I've tried everything, this isn't the usual my computer won't turn on because it isn't plugged in.
Was just incase anyone had had a similar experience and found a solution.
Cheers anyway boys 
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PaulW
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Registered: 26th Jan 03
Location: Atherton, Greater Manchester
User status: Offline
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quote:
Originally posted by Steve
if the cpu had fried it would still fire up but start beeping, same if ram failed
depending on severity of failed CPU, the MB wont beep if its dead...
happened to a mates NF7-S board, dead CPU = no post/beeps...
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jamesw
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Registered: 28th Jun 02
Location: Station Town, County Durham
User status: Offline
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Im assuming you have reset the cmos?
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Cybermonkey
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Registered: 22nd Sep 02
Location: Sydney, Australia
User status: Offline
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quote:
Originally posted by PaulW
quote:
Originally posted by Steve
if the cpu had fried it would still fire up but start beeping, same if ram failed
depending on severity of failed CPU, the MB wont beep if its dead...
happened to a mates NF7-S board, dead CPU = no post/beeps...
ANY failed CPU will still allow a boot into POST, followed by beeps. Until control has been handed over from the logic chip to the CPU bridge, a computer will function.
Something as sever as this points to power or failed CMOS/BIOS chip
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jamesw
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Registered: 28th Jun 02
Location: Station Town, County Durham
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I previously worked @ a computer firm for 4 years, repairing and building machines, we have had several AMD CPU's that wouldnt even let a board even POST
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John
Member
Registered: 30th Jun 03
User status: Offline
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Brilliant idea cybermonkey.
I'll try the old hotswap with a bios chip.
Don't know why I didn't think of that.
I can get hold of a known working bios for that, use that to boot from then when booted put the old one in and try and flash it. If thats the problem of course.
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Russ
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Registered: 14th Mar 04
Location: Armchair
User status: Offline
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have you checked PSU, cpu/nbridge spinning but no post is a sign of fucked psu. smell it, does it smell fried
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PaulW
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Registered: 26th Jan 03
Location: Atherton, Greater Manchester
User status: Offline
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quote:
Originally posted by jamesw
I previously worked @ a computer firm for 4 years, repairing and building machines, we have had several AMD CPU's that wouldnt even let a board even POST
same! 3 years building/repairing in one company, 3 years ict support at a school, many various pc's built/upgraded/repaired for friends & family...
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Cybermonkey
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Registered: 22nd Sep 02
Location: Sydney, Australia
User status: Offline
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quote:
Originally posted by jamesw
I previously worked @ a computer firm for 4 years, repairing and building machines, we have had several AMD CPU's that wouldnt even let a board even POST
interesting... Just AMD?
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PaulW
Member
Registered: 26th Jan 03
Location: Atherton, Greater Manchester
User status: Offline
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no, intel also, although they do seem to be much more robust in terms of posting abilities...
[Edited on 14-05-2006 by PaulW]
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Cybermonkey
Member
Registered: 22nd Sep 02
Location: Sydney, Australia
User status: Offline
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tell me about it 
AMD and Asrock DONT mix 
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