P770ZM-G No Post

I need some help/direction. I have a P770ZM-G that won't post. I turn it on, after about 20 seconds the fans go to max, the Lock (Caps, Num., Scrl) LEDs slowly flash a few times and it shuts down. GPU 970m.

 

What have you done so far to resolve the issue? When did it start? Any symptoms before that?

 

No symptoms before that. I was using it, it cut off. Then it wouldn't post. I thought it was like leaving it on battery too long and it going to sleep. But it was plugged in. I might have been encoding with the fans on max so it wouldn't have been abnormal for max fans when it shutdown.

It happened quite a while ago. I bought it from ****logic and you know the rest. It was/is under warranty and I waited.

I have a P750DM2-G, which just went down too. That might be the next thread. I, previously, used it's battery and power brick to eliminate the ZM's. I reset the BIOS by removing the CMOS for 30 seconds plus. The only change after that was if I plug it in it will turn on by itself and go through the same shutdown sequence as described.

 

Were the machines using the same power brick/plugged into the same plug? When you have multiple failures it's worth investigating external factors.

 

No, machines were not on same brick at time of failures. As to plug, the ZM was powered through one surge protector 95% of the time.

The DM was on a different surge protector at home and at work. The home strips were the same outlet though. That outlet did not kill my old Dell.

I had a local repair shop take the ZM yesterday. He tested and says it's the 970m. He will try to reflow with a machine he has. A replacement will be the next option.

The DM had a gradual, but not long, failure. Not waking from sleep, some times. I updated display driver then wouldn't let it sleep after that didn't work. Then the screen went black with it on, to eventually no display but not shutting down. It will power on but no display and no external display.

 

Sounds a bit like board or GPU failure. Good to hear you found a tech that can attempt a reflow.

 

Yeah, I may have gotten lucky with the tech. I thought the MB too, but what do I know.

He may get the DM next.

 

Unless you have equipment or spares it is hard to say.

 

And I've got neither.

 

The DM does sound possibly gpu related too.

 

The DM2 can take a 1060 or 1070? It has a 1070 but it hasn't gamed at all.

 

That's what it shipped with yes.

 

Can the ZM take a 1070?

Can the DM2 take a 970m?

For testing purposes.

 

If it has an eDP yes to zm so long as it's a standard mxm shape (not clevo)

No to the dm2 due to shape.

 

For the ZM, shutting down, if the GPU is removed, then the laptop is powered without a shutdown, this would pinpoint the GPU and a possible short?

 

Without a gpu it will shut down after 30 seconds.

 

OK, GPU not eliminated. That would have worked as a test if it didn't power on at all, removing it and then powering on for 30 seconds. I misunderstood what I read in another thread.

 

The behaviour suggests that a component the ECU monitors is not returning temperature/speed data. Usually this is the gpu. It's hard to confirm without having one to test.

 

Yes, finding one to test with is the current dilemma.

 

The DM2 went to a different repair shop yesterday. It is up today. They did a reflow on the 1070 and are stress testing it.

Is reflowing a GPU just a stop gap measure? Should I plan on replacing it in the near future or wait until the next failure. Is another failure inevitable?

That was a funny phone call.
"You know you have overclocking software on your machine?"
"Yes"
"You should remove it. We don't recommend overclocking."
"I underclocked with it."

I may need to inform them that the "overclocking" software (CCC, XTU) was put on there, standard issue.

 

Yes reflowing tends to be a temporary fix, how long is pot luck.