Please help with dead system
in [Chips]
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From: Chris on 15 Nov 2006 15:48 I have a pc AMD 2000+ (home built) that will not power on. It powers on but no post, no beep codes just cpu fan, power supply fan and hard disk comes on. I believe it;s the CPU because when the problem happeed there was alot of dust across the top of the heat-sink completely covering the top restricting flow of air to the heat-sink. Since there are no beeps, no post, no video and the dirty heat sink, I'm guessing the cpu. Can anyone offer any advice? I don't want to waste money replacing the cpu and I have no known good cpu's or motherboards for this cpu. Chris If life seems jolly rotten There's spmething you've forgotten and thats to laugh and smile and dance and sing!
From: KC Computers on 15 Nov 2006 16:59 >I have a pc AMD 2000+ (home built) that will not power on. It powers > on but no post, no beep codes just cpu fan, power supply fan and hard > disk comes on. I believe it;s the CPU because when the problem > happeed there was alot of dust across the top of the heat-sink > completely covering the top restricting flow of air to the heat-sink. > Since there are no beeps, no post, no video and the dirty heat sink, > I'm guessing the cpu. Can anyone offer any advice? I don't want to > waste money replacing the cpu and I have no known good cpu's or > motherboards for this cpu. It's pretty rare for a CPU to fail like that. It's more likely a motherboard or power supply issue. Can you borrow a power supply to try? --- KC COMPUTERS www.kc-computers.com Internet computer dealer since 1991!!! See customer ratings at: http://www.resellerratings.com/topstores.pl
From: Tony Hill on 15 Nov 2006 18:45 On Wed, 15 Nov 2006 20:48:53 GMT, Chris <christo9(a)notalotofunwanted.aol.com> wrote: >I have a pc AMD 2000+ (home built) that will not power on. It powers >on but no post, no beep codes just cpu fan, power supply fan and hard >disk comes on. I believe it;s the CPU because when the problem >happeed there was alot of dust across the top of the heat-sink >completely covering the top restricting flow of air to the heat-sink. >Since there are no beeps, no post, no video and the dirty heat sink, >I'm guessing the cpu. Can anyone offer any advice? I don't want to >waste money replacing the cpu and I have no known good cpu's or >motherboards for this cpu. Standard process here is to try to isolate the issue. The problem sounds like you have an electrical short somewhere in your system, which means it could be ANY component. First, pull out ALL unnecessary components, ie any PCI cards, anything connected to USB, keyboard, mouse, external speakers, hard drives, floppy, etc. etc. Basically you want to be left with nothing other than your motherboard, CPU and power supply. At the very least this should give you some beep complaining about the lack of memory. If you get nothing at that point, then at least you've narrowed it down to three parts, CPU, power supply and motherboard. Now, at this point there are only two options. First is to physically inspect the parts to see if there is an obvious proble. Most important here is to check the capacitors on the motherboard to see if they are bulging, leaking or just otherwise looking ugly. Given the approximate age of your system, I would give it about a 75% or higher probability that this is where you problem is. Now, if a visual inspection doesn't bring up anything obvious, the second option is to swap parts. Of course, this requires compatible replacement parts in order to test things, so hopefully you've got a similar spare PC lying about and/or have a friend that does. Swap parts out one at a time to try to isolate the issue, then replace the defective part. ---------------------------- Tony Hill hilla <underscore> 20 <at> yahoo <dot> ca
From: Arno Wagner on 15 Nov 2006 19:36 In comp.sys.ibm.pc.hardware.misc Chris <christo9(a)notalotofunwanted.aol.com> wrote: > I have a pc AMD 2000+ (home built) that will not power on. It powers > on but no post, no beep codes just cpu fan, power supply fan and hard > disk comes on. I believe it;s the CPU because when the problem > happeed there was alot of dust across the top of the heat-sink > completely covering the top restricting flow of air to the heat-sink. > Since there are no beeps, no post, no video and the dirty heat sink, > I'm guessing the cpu. Can anyone offer any advice? I don't want to > waste money replacing the cpu and I have no known good cpu's or > motherboards for this cpu. If the HDD starts, then both +5V and +12V from the PSU is reasonably good. HDDs have bad power detectors so they can decide when to spin-up and spin-down. One way you could get your symptoms is if the reset line (called power-good) from the PSU is failing. HDDs atsrt on their own. The way to test for this is with a different PSU. If the CPU is broken, you should get the according beep code (or POST code, if your mainboard has a POST display). However if it is partially broken, that may not work.... One thing you may try is removing the CPU and see whether you get beep codes. If you do not, then the mainboard is likely broken. This does not matter a lot, since you cannot get CPUs or mainboards from that generation anymore anyways. But first, remove everything, except CPU, RAM and video card. See wheter it still does not start. Then test with a different PSU. Then you can try the CPU removal experiment. Arno
From: George Macdonald on 15 Nov 2006 19:55
On Wed, 15 Nov 2006 20:48:53 GMT, Chris <christo9(a)notalotofunwanted.aol.com> wrote: >I have a pc AMD 2000+ (home built) that will not power on. It powers >on but no post, no beep codes just cpu fan, power supply fan and hard >disk comes on. I believe it;s the CPU because when the problem >happeed there was alot of dust across the top of the heat-sink >completely covering the top restricting flow of air to the heat-sink. >Since there are no beeps, no post, no video and the dirty heat sink, >I'm guessing the cpu. Can anyone offer any advice? I don't want to >waste money replacing the cpu and I have no known good cpu's or >motherboards for this cpu. Sounds about the right time frame for the capacitor problem - check the capacitors, especially the cluster near the CPU, for doming of the top and leakage around the base. See www.badcaps.com for examples. -- Rgds, George Macdonald |