u/Equal-Long6339

The Thinkbook 16 g7+ IAH (Ultra 9 285) has stopped turning on. The POST is not being processed. This had already happened in early April, but after standing off during the day, it turned on and continued to work properly. It started again yesterday. With varying success, it sometimes runs. But more often it just hangs: the cooler is running, the backlight is on, and that's it, it's heating up. Sometimes it can stand like this for a minute or two and turn on.