Re: Sony VAIO vpcs111fm mbx 216 does not boot

Hi meritosari,

Thanks for your response. I'll check the rail voltages (19V/5V/3V) with oscilloscope. You also mentioned "data" from EC bios(firmware). Do I need to update EC firmware? If so, can I load EC firmware with in-circuit interface (w/o removing the component EEPROM from main board)?

Re: Sony VAIO vpcs111fm mbx 216 does not boot

Any help on this topic?

Re: Sony VAIO vpcs111fm mbx 216 does not boot

I did more measurements today and I saw MAINON pin and VRON pin of the EC cannot be logic high to drive power controller chips.

[ATTACH]146237[/ATTACH]

Why WPCE775L (embedded controller) cannot hold high these pins to enable power for main board?
Also where can I find the datasheet of this EC?Re: Sony VAIO vpcs111fm mbx 216 does not boot

I did more measurements today and I saw MAINON pin and VRON pin of the EC cannot be logic high to drive power controller chips.

[ATTACH]146237[/ATTACH]...

Hello,

My Sony Vaio VPCS111FM started to hesitate to turning on. In order to explain properly I uploaded a video on youtube. You can see at this [URL="https://youtu.be/f3jXOZFLtEg"]link[/URL].

I tried power reset by removing power adapter and battery, but it did not help me to solve problem. For this reason I replaced its main board mbx-216, but unfortunately same problem struck again. I believe this main board has some design defects on itself.

In order to solve this issue I applied hot air on the main board, and it worked! Hot air solved...

Re: New Members - please post your introductions here

Hello,

This is Albin, I am an electrical engineer, also like to recover/repair electronic devices. Right before I join this forum, most of the time Google guided me to come here. I found very useful technical information and details here. I hope I will be able to contribute to this forum.

Regards...