Dell XPS 15Z won't boot

[hazardus]

Hello,

I've a Dell here with no screen problem.
Fan stuck on high speed and it does not boot.
All voltages are present except IGPU. That shouldn't be a problem because of the Nvidia GPU.

I tried with different bios same result. CPU and ram doesn't communicate I checked it with scope. KBC should be fine because power led is on.
What should I check next?
Could this be a GPU problem?

Thanks.

[ktmmotocross]

Re: Dell XPS 15Z won't boot

xps are known for their nvidia gpu. did u reflow it?

[hazardus]

Re: Dell XPS 15Z won't boot

I didn't do that yet. I'll do a reflow tomorrow. Thanks.

[hazardus]

Re: Dell XPS 15Z won't boot

I didn't reflow it yet but first I should find out why there is no communication between CPU and RAM.

[dellxps15]

Re: Dell XPS 15Z won't boot

15z should have a nvidia 525m or 540m if i remember good and they throttle when overheat, so it's very hard it's a gpu problem. component tht give more problem are those intel chipset with very small balls (0.3 0.35)

try flash bios first and some other ram with different brand value known to be fully working.

if still black screen reflow the little intel chipset or better reball or replace it.