Clevo N150SD powers on for 10 secs

[Johndill]

Re: Clevo N150SD powers on for 10 secs

You are using a known good DDR3L RAM stick right?

If it still has VCore but is not POSTing, you can probe BIOS CS# pin with the oscilloscope and LPC bus too (on LFRAME#) to see if there's any activity but it won't help much anyway. It can be almost anything, EC, PCH, CPU, maybe GPU, random stuff going on somewhere…

I'd try another known good BIOS.

Yes, I'm using a known good DDR3L RAM stick, I have even tried a second known good DDR3L RAM stick with no difference.

I don't have an oscilloscope for that.

Could I try a basic reflow with my SMD gun on one of the main chips?

I haven't been able to find any bios for this model apart from the one linked by SMDflea that I have tried.

[dellxps15]

Re: Clevo N150SD powers on for 10 secs

voltage on u20 and u22 after pressing power on?

[Johndill]

Re: Clevo N150SD powers on for 10 secs

voltage on u20 and u22 after pressing power on?

Tested and working from page 1 in post #3.

[SMDFlea]

Re: Clevo N150SD powers on for 10 secs

This board uses DDR3 1.5V RAM doesn`t it ?

[Johndill]

Re: Clevo N150SD powers on for 10 secs

This board uses DDR3 1.5V RAM doesn`t it ?

Same result with 1.5V DDR3 and 1.35V DDR3L.

[Johndill]

Re: Clevo N150SD powers on for 10 secs

What should I do next?

[Johndill]

Re: Clevo N150SD powers on for 10 secs

Anyone have any ideas?

[Johndill]

Re: Clevo N150SD powers on for 10 secs

Is this the end of the road? Anyone?

[SMDFlea]

Re: Clevo N150SD powers on for 10 secs

Do you have a Compal POST card, or a scope

[Johndill]

Re: Clevo N150SD powers on for 10 secs

Do you have a Compal POST card, or a scope

I don't have ether, the post card sounds good, is there any particular post card I should get?

[Johndill]

Re: Clevo N150SD powers on for 10 secs

I put 3.3V to pin3 & 5 of U10 and the GPU started to warm up so I assume it was powered on but same issue happened.

I put some pressure down on the CPU and the CPU fan started working as it never did before but no boot, I heated up the CPU with the heat gun and now the CPU has no Vcore so I assume the CPU is probably dead.