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| HP 250 G4 (LA-C921P Rev 1) No display https://vlab.su/viewtopic.php?f=53&t=84738 |
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| papisp [ 28 дек 2018, 17:01 ] | |
| Заголовок сообщения: | HP 250 G4 (LA-C921P Rev 1) No display |
HP 250 Plate ASL50 LA-C921P REV. 1 CPU: A5405794SR2EY GPU: Integrated EC: ENE 9022Q The board turns on, the fan starts, no image on the matrix and on the external monitor. I changed RAM, I programmed the BIOS with a certain charge, the power consumption with the switch on without batteries is kept at around 0.44A. Voltage from coils when the board is on and resistance to mass off. PL202 3.1V 4.6 MOhm PL407 1V 42.0 Ohm PL1206 1.1V 9.0 Ohm PL1203 0V 2.7 Ohm PL1205 1V 3.8 Ohm PL8 5V on the other side of the 10V Mega Ohmy coil PL9 3.3V 9 kOhm PL11 1.1V 320 kOhm Low resistance PL1203 is on the CPU side. The processor power transistors are operational. I have no ideas, no scheme |
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| alex_anders [ 29 дек 2018, 13:30 ] | |
| Заголовок сообщения: | Re: HP 250 G4 (LA-C921P Rev 1) No display |
Try to use a post-card |
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| kjosmofon [ 03 янв 2019, 18:22 ] | |
| Заголовок сообщения: | Re: HP 250 G4 (LA-C921P Rev 1) No display |
i think bios problem, find 100% working tested dump |
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| Лишенко Александр [ 03 янв 2019, 20:40 ] | |
| Заголовок сообщения: | Re: HP 250 G4 (LA-C921P Rev 1) No display |
viewtopic.php?p=528409#p528409 |
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| papisp [ 08 янв 2019, 22:27 ] | |
| Заголовок сообщения: | Re: HP 250 G4 (LA-C921P Rev 1) No display |
Bios checked unfortunately unchanged |
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