HP ZBook Freezes

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chzuck

PCHF Member
Oct 31, 2023
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I have an HP ZBook 15 G3 that has developed a problem. If picked up by the lower left hand corner the screen freezes. nothing responds. The only way to shut if down is to hold the power button down. I can restart and it will work fine until it is bumped or picked up on the left lower side. Looking for some trouble shooting ideas, please.
I have eliminated by battery by disconnecting and running on AC power.
 
No cracks visible anywhere.
I can cause some lines on the monitor by putting pressure on the left lower corner of the laptop. Seems like something in that area is the problem. I will remove the battery and see what is under there and if anything looks suspect.
 
This is a sign of BGA failure (Ball Grid Array failure).

It means that a soldering of a component is cracked/failed.
Was much more often seen around 1995-2005 when the transition from lead to non-lead soldering took place.

Non-led soldering requires higher temperatures and the tools available at that time could not -always- deliver.

HP submitted to us technical personnel -I was Senior Repair technician at HP Financial Services back then..-a rough test:

If a system exhibited intermittent failures, let the system run on a flat surface for some time and then lift it from a corner.

If anything happens, BGA failure is the prime suspect.
 
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georgeks said:
This is a sign of BGA failure (Ball Grid Array failure).

It means that a soldering of a component is cracked/failed.
Was much more often seen around 1995-2005 when the transition from lead to non-lead soldering took place.

Non-led soldering requires higher temperatures and the tools available at that time could not -always- deliver.

HP submitted to us technical personnel -I was Senior Repair technician at HP Financial Services back then..-a rough test:

If a system exhibited intermittent failures, let the system run on a flat surface for some time and then lift it from a corner.

If anything happens, BGA failure is the prime suspect.
Click to expand...
So, how to find the problem area? Could it be isolated to that corner where I apply pressure to make the event happen?
 
No, I am sorry, they didn't tell us that.

Maybe opening it and inspecting the M/B on that area with a magnifying glass will get you some information.

Believe it or not, I've had some information of companies buying those motherboards and treating/fixing them in ovens!!

Have a look here: HP ZBook 15 G3
 
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