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| AH531 (DAFH5AMB8F0) No power https://vlab.su/viewtopic.php?f=57&t=18179 |
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| P.zonouz [ 08 янв 2014, 13:03 ] | |
| Заголовок сообщения: | AH531 (DAFH5AMB8F0) No power |
Hi. Laptop brought not switching. RT8206M changed so now there is 3.3VPCU and 5VPCU. So IO(NPCE791L) feed have 3.3V(pin 19,46,76,88,115) but on 95th pin( NBSWON# ) there is no Voltage(0.012V). NPCE791L changed but new one but nothing changed. NBSWON# is not short circuit. Any Idea? |
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| chulat [ 08 янв 2014, 17:14 ] | |
| Заголовок сообщения: | Re: AH531 (DAFH5AMB8F0) No power |
What on S5_ON? check check their: 0. When BIOS & EC-firmware 100% are working 1. When EC power is present, his quartz working and EC reading the bios data (look data exchange on BIOS chip an oscilloscope) 2. When ACIN = 3.3V 3. When LID_SW# = 3.3V 4. When EC drop RESET from SouthBridge, т.е. EC_RSMRST# = 3.3V 5. When by pressing of the power button the signal ON/OFFBTN# falls to zero and the same signal is broadcast in PBTN_OUT# 6. When from the SouthBridge signals PM_SLP_S3# and SLP_S5# are drop, i.e. voltage on them will be 3.3V |
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| P.zonouz [ 08 янв 2014, 17:38 ] | |
| Заголовок сообщения: | Re: AH531 (DAFH5AMB8F0) No power |
chulat писал(а): What on S5_ON? 5. When by pressing of the power button the signal ON/OFFBTN# falls to zero ON/OFFBTN# has no voltage to drop!!! I must be 3.3v till power switch pressed... but no voltage produced. |
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| P.zonouz [ 08 фев 2014, 18:03 ] | |
| Заголовок сообщения: | Re: AH531 (DAFH5AMB8F0) No power |
hi putting Pull-up resistor now there is 3.3V on power sw. programing EC+BIOS power on but no display. I am not sure from BIOS. Any Working BIOS? M.B is discrete and by soldering POST CARD stays on E3 code. E3 DEBUG_REVISION_2 , I guess it is because of bad BIOS. |
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| P.zonouz [ 26 май 2014, 16:35 ] | |
| Заголовок сообщения: | Re: AH531 (DAFH5AMB8F0) No power |
Bios Dumped from working one, but still stays on E3 Post Code. any Idea? My guess is PCH or VGA, any idea? |
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| cic [ 27 май 2014, 11:57 ] | |
| Заголовок сообщения: | Re: AH531 (DAFH5AMB8F0) No power |
I think it's VGA |
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| P.zonouz [ 03 июн 2014, 12:07 ] | |
| Заголовок сообщения: | Re: AH531 (DAFH5AMB8F0) No power |
Hi back to all. VGA chipset picked up by BGA. so there is a inflation on the surface of motherboard under the VGA chipset area. I think chipset replacement seem not successful for this kind of problem. Is it possible to make it UMA? I mean This motherboard must boot because of Intel HD graphics but we have no display. |
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