fan was slow so it got a drop of m1
crap jee caps so in go polymers.
crap jee caps so in go polymers.
Attached Files
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a few days ago I finally purchased mser-100 v2 and I tested its abillity of measuring ESR value.
I found that It shows pretty accurate ESR value for electrolytic capacitor,But When I measure polymer capacitor of dreamcast game console,I found that one third of polymer capacitor's ESR value is more than twice the value of ESR meter table.(for example, I measured one polymer capacitor of 6.3v 100uf, It showed ESR value of 7.68)
Although my dreamcast now turns 20 years old but it still works. I occasionally have played game with it.
Is this ESR value of polymer capacitor correct?... -
Hi forum.
I'm working on a macbook pro, model a1708, that is running extremely slow.
Everything on it seams to work just fine, it just works extremely slow; painfully slow; especially running macos (windows and linux actually run OKish on it, slow, but usable).
One other symptom of the problem with the machine is that the fan is always running at full speed.
This machine has been worked on by someone else previously; they tried to repair it, but with no success. The motherboard does have sings of being worked on, but it all looks good/OK; like... -
Trouble shooting an A2251, it is giving me the behavior that all three USB jacks except the DFU port are reading 5.18V .24A, the DFU port draws no current.
Tried swapping that CD3217 from a donor, that changed to DFU port same behavior the adjacent USB port is now boot cycling, other side un effected.
Hindsight probably should have checked the diode drops first.
I removed L8100 to confirm that the PP1v1_S3 rail was "shorted" It reads about 2.4ohm and .009V on diode drop. The HighSide Low Side FETS before L8100 appear to be fine. Proper diode...01-18-2025, 04:38 PM -
Hi to everyone.
I never seen something like this. I have HP Notebook 15-dy1731ms motherboard: DA0P5DMB8CO REV C that is very very slow. I tried all the basic, updating the bios, replacing ssd, replacing ram, soldering all coils, reflow CPU power supply but the laptop is still very very slow. Never seen a motherboard that is slow. CPU power suppliers 1.8 volts, the cpu barely getting hot.
What left for me to do is reflow the CPU and try manually programing the bios chip with programer.
Anyone have any idea what it can be? -
DELL PRECISION 3440 SFF X4N41 10th 25Q256 Slow startup
ST-3L0GZB3
needs cleaning.
Please help me clean up the slow startup dump if you have time. Thank you....
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