Question Laptop SHUTS OFF after being on for 5 seconds ?

[Electronics Repair]

Hello, my Samsung NP350V5C-A01UK laptop is shutting down after 5 seconds. I tried the ram, hard drive, power supply and power button. CMOS is dead, but surely it should still boot to bios? This laptop didn't come with a battery either. The blue power led stays on for five seconds, then goes off and fan turns off.

Here is the schematics: 1:
https://www.s-manuals.com/pdf/motherboard/compal/compal_la-8861p_r0.2_schematics.pdf
What should I do next, I really want to get it working?

 

[JohnBonhamsGhost]

This laptop didn't come with a battery either

laptop came with no included battery pack?
you bought it used?

CMOS is dead

and CMOS battery is dead?
what would lead you to this conclusion?
you have replaced it to determine this?

What should I do next, I really want to get it working?

did you ever actually see it in a working state in person?

 

[Electronics Repair]

Came without battery pack
CMOS battery is dead, it’s about 1.3V which is low
I tried replacing with CR2032 battery which didn’t work.
Also, I’ve never seen this laptop working.

 

[Electronics Repair]

This was the original CMOS battery: https://i.postimg.cc/kVvXShYF/IMG-5780.jpg.
I tried resoldering.

 

[JohnBonhamsGhost]

I’ve never seen it work as well... laptop is shutting down after 5 seconds

very likely why it was being sold then

 

[Electronics Repair]

very likely why it was being sold then

Yes. Didn’t come with a power supply either I had to buy one myself. No ideas on next steps? Was looking forward to a project with this laptop

 

[JohnBonhamsGhost]

No ideas on next steps?

contact Samsung or browse Amazon type retailers for replacement parts; motherboard, etc.

if the system doesn't properly boot there's not much you can diagnose at home except to start replacing components and find which is the culprit.

Samsung should be able to put you in touch with any repair center nearby which should be able to do these diagnostics for you and let you know what exactly needs replacing but it could end up being quite expensive even if you just get the parts and replace them yourself.

 

[Electronics Repair]

contact Samsung or browse Amazon type retailers for replacement parts; motherboard, etc.

if the system doesn't properly boot there's not much you can diagnose at home except to start replacing components and find which is the culprit.

Samsung should be able to put you in touch with any repair center nearby which should be able to do these diagnostics for you and let you know what exactly needs replacing but it could end up being quite expensive even if you just get the parts and replace them yourself.

Well yes I can buy a replacement motherboard and swap it true, I was hoping that’d be a last resort and maybe I could learn some more skills. Just making sure, if the CMOS battery was the issue the regular CR2032 battery would work, right?

 

[JohnBonhamsGhost]

CR2032 battery would work right?

the majority of CMOS batteries are these same coin cell type.

unless this laptop has some odd OEM type in place that is what it would use.

 

[Electronics Repair]

the majority of CMOS batteries are these same coin cell type.

unless this laptop has some odd OEM type in place that is what it would use.

The one it uses was smaller than a 2032 and rechargeable which now makes me think it may be one of those OEM types