HP Omen 15 laptop shuts down very quickly.
HP Omen 15 laptop shuts down very quickly.
I recently performed a shell and battery replacement on an HP Omen 15-ax243dx for a friend. The laptop arrived working, but later it wouldn’t power on at all. Once I returned it, I reassembled everything securely and still faced the same problem. When I pressed the power button, the keyboard would light up briefly before turning off instantly. Neither the screen nor the fans activated. The hard drive seemed to attempt startup but then abruptly cut out. After that initial failure, pressing the power button only caused a brief moment of activation before it shut down again almost immediately. It sounded like the machine tried to turn on and then stopped right away. Removing the battery and charger, holding the power button to drain any leftovers, and reconnecting the cables often reset the cycle—though the keyboard would light up once, then stop. I attempted a CMOS reset, swapped batteries, and even tried two different non-OEM cells, but nothing changed. All ribbon cables appeared intact, though the HDD ribbon tips seemed slightly loose. I suspect the issue might be with the motherboard itself rather than the charger or battery. If it’s a dead board, ordering a replacement from eBay seems like a last resort, but I want to confirm before spending around $200. Any advice would be greatly appreciated.
Does the fan have power? A disconnected fan can lead the mainboard to stop working.
Both units remain linked, repositioned for security. If one works but stops, applying voltage and causing rotation suggests it’s likely not the problem.
They appear to be okay. That was the only thought that crossed my mind, though I’ll consider it further.
Both components remain attached to the heat sink, which I left in place while taking apart. I’m planning to take off the heat sink first and inspect it afterward, but I’d prefer to experiment with other adjustments before doing so.
Hello, I hope this has been addressed before. We're facing the same issue. From what I see: 1) When the back cover is open, one fan starts working correctly, but the second fan begins to spin and then stops. 2) Leaving the laptop off after the cycle you described for about 10-15 minutes also results in the same pattern. It would be great if someone could resolve this and share their decision here.