[ariejan]

It's not uncommon for solder joints to get damaged due to heat stress. It happens to BGA compontents too when not properly cooled. The hair dryer may or may not have provided enough heat to fix a small crack (I didn't look up the temperature a hair dryer provides).

Did kind-of the same with my Philips TV a while back. Still going strong.

https://www.devroom.io/projects/repair-philips-42pfl6057h-12...

[cestith]

"Hair dryer" is such an imprecise term in a use case like this. One can find 600 watt units all the way through about 2300 watts. A typical general-purpose heat gun one might use to strip paint or shrink some heat-shrink plastic is usually between 1500 watts and 1800 watts.

[mannykannot]

While the power consumption may vary considerably, the maximum temperature is presumably constrained by what humans and their hair can tolerate.