>Laptop showing distorted graphics
>Laptop shows vertical or horizontal lines, but there is no damage to the LCD
> Laptop shows dots on screen
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There are many contributing factors to this fault. The first is the use of lead-free solder. Much has been documented online about how lead-free alloys are not as durable as leaded solder. The APU is bonded to the motherboard by a BGA (Ball Grid Array) method, which is a grid of tiny solder connections. Over time the solder connection deteriorates through heat stress. Also, the motherboard slightly warps with use through the heating up and cooling down process and this can cause the solder connections to break.
You may also experience an overheating message or the laptop may turn on and operate normally for a short period of time before it fails. This can be due to the fact that as the laptop heats up the motherboard expands with the heat and then pulls the connections apart. The laptop may also freeze when this happens or show distorted graphics.
Poor ventilation can be another cause. Keeping the laptop in an enclosed area can restrict the airflow and cause it to overheat. We have seen before that just moving the laptop from a warm environment can allow the console to run like normal.
The first thing we do before any repair is test the laptop to confirm the fault. We then strip the laptop down, cleaning the dust out as we go. We then clean up the motherboard and remove all of the old thermal paste. We use a controlled machine that remelts the solder and straightens the motherboard so the connections are reformed.
We rebuild the laptop and the repair person carries out an initial test before the laptop is passed over to our saturation test bench. We test all functions and run the console through a number of heat cycles to ensure the problem doesn't return. All GPU/APU repairs are tested for a minimum of 8 hours.