Badcaps.net Forum
Go Back   Badcaps Forums > Troubleshooting Hardware & Devices and Electronics Theory > Troubleshooting Laptops, Portable, and Mobile Devices
Register FAQ Calendar Search Today's Posts Mark Forums Read

 
Thread Tools Display Modes
Old 11-26-2020, 04:14 AM   #1
videomax
New Member
 
Join Date: Nov 2013
City & State: Amarante
My Country: Portugal
Line Voltage: 230VAC 50Hz
I'm a: Professional Tech
Posts: 5
Default Sony SVF152A29M DAOHK9MB6D0 Dead

Hi,

Laptop completely dead and don't react to power switch.

+3V_WAKE, +5V_WAKE, +3VPCU present

Checking NUVOTON NCPE985LA0DX line "NBSWON#" (power switch ) wont rise to 3v.

After replacing EC NCPE chip the problem mantain exacly the same.

Question. Does this chip need to be programmed ?
Does anyone have a power up sequence for this board ?

Any help at all ?

Thanks
videomax is offline   Reply With Quote
Old 11-26-2020, 05:27 AM   #2
SMDFlea
Super Moderator
 
Join Date: Jan 2018
City & State: York
My Country: UK
I'm a: Knowledge Seeker
Posts: 5,768
Default Re: Sony SVF152A29M DAOHK9MB6D0 Dead

Schematic https://www.badcaps.net/forum/showth...ht=DA0HK9MB6D0
SMDFlea is offline   Reply With Quote
Old 11-26-2020, 05:37 AM   #3
videomax
New Member
 
Join Date: Nov 2013
City & State: Amarante
My Country: Portugal
Line Voltage: 230VAC 50Hz
I'm a: Professional Tech
Posts: 5
Default Re: Sony SVF152A29M DAOHK9MB6D0 Dead

I have schematics! There is no Power up sequence.
I have struggle to identify why NBSWON# does not rise.

Thanks anyway.
videomax is offline   Reply With Quote
Old 11-26-2020, 07:56 AM   #4
piernov
Moderator
 
Join Date: Jan 2016
City & State: Valbonne, 06
My Country: France
I'm a: Knowledge Seeker
Posts: 2,762
Default Re: Sony SVF152A29M DAOHK9MB6D0 Dead

Confirmed it's not a power button problem?
Did you try toflash the BIOS?
+5V_S5 and +3V_S5 present?
__________________
OpenBoardview http://openboardview.org | IRC #[email protected]
piernov is offline   Reply With Quote
Old 11-26-2020, 08:22 PM   #5
videomax
New Member
 
Join Date: Nov 2013
City & State: Amarante
My Country: Portugal
Line Voltage: 230VAC 50Hz
I'm a: Professional Tech
Posts: 5
Default Re: Sony SVF152A29M DAOHK9MB6D0 Dead

Hi Piernov

Power button checked and OK
+5V_S5 and +3V_S5 present!
After flashing Bios chip "NBSWON#" becomes high board starts up.

Many Thanks for your help.

Best regards
videomax is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



Badcaps.net Technical Forums 2003 - 2021
Powered by vBulletin ®
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
All times are GMT -6. The time now is 02:36 PM.
Did you find this forum helpful?