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BIOS Yoga S740-14IIL GS452/GS552/GS752 NM-C781 Rev 1.0

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Yoga S740-14IIL GS452/GS552/GS752 NM-C781 Rev 1.0
boardview Lenovo Ideapad 3 14iml05 - NM-C781 REV.0.2 BoardView.tvw
Schematics Lenovo IdeaPad-3-15IML05 LCFC GS452 GS552 GS752 NM-C781.pdf
NM-C781 photo
Lenovo IdeaPad-3-15IML05 - LCFC NM-C781 REV1.0.tvw


Screen Shot 2021-07-31 at 3.37.04 PM.jpgWhatsApp Image 2020-09-12 at 22.45.48.jpeg
 

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WhatsApp Image 2020-09-12 at 22.45.48.jpeg
NM-C781 IT8586E_20210827_154544.BIN.zip
48.2 KB · Views: 1,270
NM-C781 photo.zip
21.8 MB · Views: 1,214
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Hi need help the board

Plug in dc adaptor the led on power switch is blinking and unstable CSR voltages no 19.5v or 20v (PR5301) No Voltages on ACDRV and ACOK .. Note No battery connected..

But if i plug the battery and dc adaptor CSR voltages stable have 19.5v or 20v, have ACDRV and ACOK voltages.

already try flash the bios but same issue.

what could bi the problem in this problem..
 
techgalaxy said:
Hi need help the board

Plug in dc adaptor the led on power switch is blinking and unstable CSR voltages no 19.5v or 20v (PR5301) No Voltages on ACDRV and ACOK .. Note No battery connected..

But if i plug the battery and dc adaptor CSR voltages stable have 19.5v or 20v, have ACDRV and ACOK voltages.

already try flash the bios but same issue.

what could bi the problem in this problem..
Click to expand...
Hardware problems are difficult to consult online
 
Can anyone understand from this table how to disable onboard RAM?

I put RC812 RC805 RC811 but onboard ram still recognized
 

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RAM.jpg
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