Disclaimer: I just tested the method in the post with my laptop and am not sure whether it works with one specific model (although it seems work for some others according to the comments).
The method in the post is just one example solution.
If you know that the AC adapter is working properly and it outputs correct voltage but the laptop is still dead, most likely you have a power issue on the motherboard (or power board on some laptops) and it has to be replaced.
If you have to replace the AC adapter, make sure you use a correct one.
In this case, you may try another image file or another USB flash disk.
You need to prepare a USB flash disk and another computer that is connected to the Internet (we need to download the BIOS image from HP). Format the USB flash disk’s filesystem to FAT16 on another computer.2. Remove the AC power and battery from the lapttop.5. After the laptop starts short beeping, release Win Key B.11.Driver Assist can save you time and remove any guesswork related to researching driver issues by providing instant access to the most relevant content for your computer's hardware, solution article, even some of the old device which not supported/provided by the device manufacturer's website again.After installing critical drivers for your system, our top recommendation will automatically scan your PC on a regular basis for new releases.Driver Assist identified by scan your PC and uniquely identified your PC operating system and motherboard and every device drivers using an intelligence software - This ensure your PC & device attached getting the correct, latest device drivers and compatible to avoid system resource conflict.Get wrong device drivers or using outdated drivers can cause your Windows PC problem for now and future in terms of slow on performance, Windows crash or hidden your device advanced functions feature.