This particular solution isn’t one that I discovered, though unfortunately in the course of seeking a solution I neglected to bookmark the post in which I read it.
There can be many causes for an automatic repair loop, so this solution may not fix the problem for everyone.
While working on a laptop for some friends I encountered a problem after applying some Windows updates. On restart the system went into a repair loop, which resulted in an inability to restart into Windows.
Some friends of ours asked me to see if I could repair an HP laptop that was suffering from power problems. The system was prone to lose power even when moved only slightly. In addition, the battery wasn’t able to charge properly and the power LED often flashed different error status codes.
After looking at a repair manual, and the system itself, I concluded that there were three likely causes of this problem: (1) a faulty power connector, (2) a faulty motherboard, or (3) a faulty power button.
The power button seemed to be the least likely cause. If it was bad I would expect it to only be a problem starting up or shutting down the system, but not a problem once the system was powered up and running.
The motherboard was a more likely candidate than the power button. However, since the system does have a separate power connector, which wasn’t soldered onto the board, I figured it was the most likely cause, and also the least expensive to fix.
Warning: Based on information provided in several posts, and from talking to friends, it is very possible that you could severely electrocute yourself if you don’t know what you’re doing or if you touch the wrong part of the electronics. If you’re not sure it’s safe to do this then simply don’t. When I replaced the board I was very careful not to touch any components, including the underside of the board I was replacing. Of course, the unit must be unplugged before proceeding and it may be a good idea to let it sit for a couple of days before opening it.
A couple of weeks ago we experienced a power surge from a nearby lightning strike that damaged one HVAC unit along with a few electronics. One of the items that was damaged was our older 32″ Philips LCD TV. This was largely my fault. I used to have a surge protector on that TV but the last one quit working and I forgot to replace it.
When we tried to turn the TV back on it wouldn’t work and I noticed that a red LED, near the power LED, flashed 6 times, stopped, and then flashed the same sequence.