I tested with a heat gun that was a little bigger, around 2.5cm in circumference. Got both U12 off smoothly. But the card now does not seem to start or give any start to the disk. They look completely except slightly burnt on contact plastic. Guess you should have a smaller one as indeed surrounding components are sensitive to heat? Tested another card and they became the same. But without anything burned.
I have also placed the U12 on the with dot on the card for pin 1. But no motor response.
I have also placed the U12 on the with dot on the card for pin 1. But no motor response.
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