ASUS G513R - cannot remove MOSFET

[someonenotyou]

Hi.

I have a ASUS G513R laptop with shorted MOSFET (MP86959GMW-Z 45A).
I tried to preheat the board to 200C brom the bottom and with rework station set to 400C I flowed it for about 2min. The MOSFET does not come off.
Of course, I did not force it, but tried to lift it up with tweezers.

Is it possible, that these MOSFETs are glues to the board? Or it got welded to the board from the short? It looks intact, no signs of blowing up.

[reformatt]

I assume this is either the multi-phase driver for the CPU or GPU. This area has high thermal mass so requires patience to remove. Depends on your hot air station and nozzle size as to temp and air flow. I use a 6mm nozzle at 460 degrees at 50 air flow on my Quick TR1300A. Using too small a nozzle and too low a temperature will prevent the board getting hot enough to allow the solder to melt. If your hot air station is up to it, you shouldn't need to pre-heat the board.

If the solder around the IC is melted, then yes, it's likely welded to the board but this usually would mean the CPU or GPU is fried. Generally the laptop power adaptor should go into shutdown and this can save the GPU if it's quick enough. But if the IC has had power pumping through it in order to weld it to the board, then I would say the silicon after it is fried. My was of dealing with welded pads is to use a grinding pen on the IC or FET.