Non-dell power cord wont work

may need new charger get it tested.

Unplug monitor form AC outlet, wait for few minutes and plug again.
Check cable attache to PC.
Hope this trick will work.

seems there is HDD failure,Run the HDD test.

Verify that the light on the power block is green with the cable only connected to the wall. If the light goes out when it's connected to the PC the your motherboard is bad.

check if the power ac adapter pin the goes to the side of the laptop is damage, if not then try connecting ac adapter with laptop to a diff power wall socket, if fails then replace the motherboard.

You have to include your SATA driver into XP. Otherwise it wont detect your Hard drive. You may need a utility called nlite to do this.
I found this article very helpful to install XP on my inspiron
http://news.softpedia.com/news/Install-Windows-XP-On-SATA-Without-a-Floppy-F6-47807.shtml

Does it power on at all using only the cord
You could try removing the battery and putting it back in.
How old is the system

If you had a broken cord and moved it around to get it working you could have damaged the connection inside the lap top itself
happens a lot usually around $60.00 and up to replace

u r very correect its the time for new 1 to be bought. u can get the new 1 from radio shack websites. and also dont try to use that faulty charger again as it can possibly blow the laptop electrical parts internally due to any over power short circuit.

First off, this is a comment from a random person who may or may not know ALOT about these printers and toner/printer design in general. All toners are not designed to the same specification. Toner is a combination of plastic "pigment" and iron like shavings to make it magentically attracted to the electrical charges within the unit. Different toners conform to different grades and mainly size of the particles within the blend. The manufacturer doesnt only recommend that you use their toner to make them money, yes of course it makes money, but its because when the unit is designed it is designed to use a certain grade of toner, trust me if you put the non-branded toner vs the branded toner under a microscope you would see quite a difference. Often the non-branded toner is much larger in particle size (obviousely because its cheaper to make at this spec). This causes a variety of issues from excess toner not being cleaned off of developer rollers, IDT rollers, or clogging of toner dispenser tubes in the unit and the micro filters contained at the toner dispenser assy and developer assys. Also as for the issue not changing when switching to dell branded toner - the dispenser tubes within this unit contain up to 500-1000 pages worth of toner, making no change in toner you make immediately visible. Also depending on the damage caused by the previous toner, it may not be able to be fixed until all the components in between the toner and final delivery (drum cart) are replaced. In this case more than likely the toner dispenser assy, all developer assy's, and drum cartridge need to be replaced, and than be sure to stick with factory branded toner :)

hi friend
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contect him diis cribe ur hole the problem he will gave u a solution
here is link for u
http://h10025.www1.hp.com/ewfrf/wc/contacthp?lc=en&cc=us&lang=en&product=500508&dlc=en