Timeline for Laptop motherboard not working, quiet clicking noise
Current License: CC BY-SA 4.0
11 events
| when toggle format | what | by | license | comment | |
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| May 10, 2022 at 19:47 | history | edited | Levente | CC BY-SA 4.0 |
added new measurements and information 2022.05.10.
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| Mar 15, 2022 at 20:43 | comment | added | Levente | @brhans With the PR301 shunt resistor i was thinking the same. If it degrades over time it's resistance would rise (probably?) then the BQ24780 would detect a false OC event then shutdown the whole thing. I have edited the post on 2022-03-15 and now the MOBO works, currently. I would cross out a worn out shunt resistor for this reason. | |
| Mar 15, 2022 at 20:36 | comment | added | Levente | @brhans Thank you for your kind words. : ) I tried to document as much so it helps other understand the problem. I am happy you liked it. It takes time but definitely worth it. | |
| Mar 15, 2022 at 20:35 | history | edited | Levente | CC BY-SA 4.0 |
added 1337 characters in body
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| Mar 4, 2022 at 5:31 | history | edited | Levente | CC BY-SA 4.0 |
added 2 characters in body
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| Mar 3, 2022 at 5:48 | history | became hot network question | |||
| Mar 3, 2022 at 1:54 | comment | added | brhans | Have you checked the condition of PR301? At 0.01R it'll be difficult to test, but your waveform showing ACDRV & series current makes me wonder if the BQ24780 thinks it's detecting an over-current condition (measuring the voltage across PR301) and trying to shut down. You could try bridging over PR301 pins 2 & 3 or PC305 with a short jumper wire to see if that makes the BQ IC happy. | |
| Mar 3, 2022 at 1:50 | comment | added | brhans | Wow... It's spectacularly rare for such a detailed repair question to get posted here. Wow. Would give you multiple +1's if I could! | |
| Mar 3, 2022 at 0:00 | history | tweeted | twitter.com/StackElectronix/status/1499172816620503043 | ||
| Mar 2, 2022 at 22:14 | answer | added | Ilya | timeline score: 17 | |
| Mar 2, 2022 at 21:44 | history | asked | Levente | CC BY-SA 4.0 |