SOURCE: HP Pavilion zd800, recharing problem
If you have a multimeter you can test the voltage coming out the end of the AC adapter to make sure your charger is functioning properly. Otherwise as is very common with laptops your DC jack is probably "loose". Meaning the internal part on the laptop side has contacts that usually succumb to general wear and tear and have to be repaired. If you have a laptop repair facility in your area that does laptop repair you'll probably want to take it to them. Or possibly contact HP at 1-800-HP-INVENT to find out the closest repair facility for you.
SOURCE: Blinking power light
It could be the timing of the cartridge is out possibly from the belt.
It should be serviced by a technician.
SOURCE: 6 beeps on start up, no video
Without knowing what yo have for a BIOS, it is difficult to diagnose. The below link is a list of beep error codes for different BIOS types. Check your BIOS to see if it is one on the list and see what it means:
http://www.technick.net/public/code/cp_dpage.php?aiocp_dp=guide_beep_codes
SOURCE: I have a HP laptop
some laptops have 2 cmos batteries reset it in the bios and see what happens there
SOURCE: laptop wont boot and the battery and power lights flash
"......no beeps and it is a 3rd party charger for this model of laptop."
That 3rd party adapter could be the problem. Also, try to take out the battery and power it up from AC adapter only.
Ideally, try to find original AC adapter just for testing.
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