The computer is Compaq Evo D510 SFF, with motherboard spare part number 277977-001 (where SFF means Small Form Factor). The processor is P4 2GHz, on socket 478.
1. For many years the computer was worked fine without any problems.
2. One day is suddenly "freezes" and, after waiting some time, it is shut down from the power botton. And it no longer boots.
3. I tought "It is a semiconductor device - the capacitors do not fail so suddenly". But there were 13 bad capacitors, most of them in the processor core voltage regulator.
4. They were National Chemi-Con KZG 2200uF, 6.3V, which have ESR of 12 mOhm.
5. I replaced them with Hitano EXR with the same value, but they have ESR of 68 mOhm.
6. The system started and worked fine for about 30 minutes. Then it restarted, and again it was not able to boot. After a rest of about 5 minutes it was able to start again. This time it worked about 5 minutes and got "frozen".
7. That was - the system is in its initial condition, can not start.
The question is - what is the problem, the ESR of the capacitors?
Or there is something else that I did not got in consideration?
1. For many years the computer was worked fine without any problems.
2. One day is suddenly "freezes" and, after waiting some time, it is shut down from the power botton. And it no longer boots.
3. I tought "It is a semiconductor device - the capacitors do not fail so suddenly". But there were 13 bad capacitors, most of them in the processor core voltage regulator.
4. They were National Chemi-Con KZG 2200uF, 6.3V, which have ESR of 12 mOhm.
5. I replaced them with Hitano EXR with the same value, but they have ESR of 68 mOhm.
6. The system started and worked fine for about 30 minutes. Then it restarted, and again it was not able to boot. After a rest of about 5 minutes it was able to start again. This time it worked about 5 minutes and got "frozen".
7. That was - the system is in its initial condition, can not start.
The question is - what is the problem, the ESR of the capacitors?
Or there is something else that I did not got in consideration?
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