Hp pavilion dv7 power button

This is a common problem with cq series laptops the LED next to the power jack is on a return lead from the motherboard, so if it lights then power is getting to the board. Sadly if it goes out after 5-10 seconds, it indicates that the power distribution part of the motherboard has died. this area is all surface mounted discreet components so repair is very unlikely, a new motherboard is required. it seems to happen when the original battery reaches the end of its life. Hope this helps. dougmewpet

I had the same problem in the past with an old Dell XPS15z. Turned out that the battery was broken beyond repair. Since it's been 5 months I assume you have tried the obvious stuff: checking the connection, letting it cool down, restarting the computer, etcetera. You should try using the same charger for a different laptop if you haven't already, and also check to make sure the software isn't corrupted or anything. Otherwise it's probably a hardware problem with the battery. It's likely that the electrolytic part of it for some reason isn't working properly, and you most likely will have to get it replaced.