I have had the same problem with my TX2000 series laptop.
I disagree with some comments that the problem is to do with the display (at least in my case).
This seems to be a frequent problem with Pavillion laptops, and many DVseries laptops were recalled due to a similar problem.
I spoke to the HP Corporate office in the USA (650-857-1501, press 0, ask for a case supervisor), and was told that though it was a common problem, it was not commen enough for them to recall the machines.
The reason I know mine is NOT a display problem, is that if I put a bootable disk into my CD player, it will not load, and if I leave my machine running for a minute (it would normally play the vista music and display the login screen), nothing plays.
Certainly, it should still play the music if it is loading correctly.
If your machine is out of warranty, the best thing to do it to purchase an extended warranty, wait 30 days and then send the machine in for repair (there is a requirement that you wait for 30 days if you need hardware replacement).
Or, you could do what I did, and call the HP corporate office, where the case supervisors are allowed to discount up to 50% of the price of immediate out-of-warranty service.
In my rather extensive research, I did read of people who, by underclocking their machines, and using cooled trays for their laptops, were able to prolong the life of their units.
In summary, the issue was blamed on an overheating motherboard, which can burn up portions of the motherboard, or cause the solders on joints to come lose, causing component failure.
Hope this helps someone.