I have an Acer E1-572 4200u motherboard with built-in video and processor, I know I can not set a very high temperature because I can damage the processor and I can not set a very low temperature because I can not remove the chip there. I ask: what is the ideal temperature and the time too?
Many colleagues have reported that the BGA T862 machine is of inferior quality because they have already been able to burn the chip at the time of removal.

The most important thing for me would be to know the specifications that the machine must have in order not to buy the wrong machine.
I'm thinking of setting up a machine for myself. Does an 110V and 350w ceramic resistor with 70mm by 70mm measures already help?

With BGA T862 will you hard,if you have friend,he have Achi or Jovy eco with it easy

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Is it true that after you make an attempt to reballing and do not get 100% correct you can not reballing again?

Are you wondering, what is the most efficient and effective way to do reballing, using infrared or hot air?
With the I5 processor and video attached, such as Acer's I5 4200U notebook, which is the most appropriate technique for reballing, is there any tecnic and correct procedure to perform?

You must have:
- good BGA Rework station
- all necessary materials. Flux, etc.
- enough experience

Haswell processor is the most difficult case.

without a decent BGA rework machine and a lot of experience please do not even think of it.