I think your ACPI feature is not enabled in the bios. Take the battery out and then put it back in. Start then enter bios setup.

Have done that as well. Nothing comes up on the screen, it just keeps restarting. The hardrive spins up and DVD-rom as well. The CPU fan also starts up, later on it switches off- it is that AMD's lownoise CPU temperature feature, Obviously CPU does not heat up. Well it restarts before then obviously.

:-( The scary thing is that it worked ok, and then all of a sudden- NOTHING.

I wonder if something died all of a sudden. Because it does not go into the bios. And it is not the screen because I tried connecting it to external monitor. Nothing .

I think it's a video problem. I am not familiar with your laptop but some video boards in different laptops pop up from their connector on the system board. Try pushing it back in place.

Nopes, as tight as it can be.

I wonder why it does not go to BIOS, not displays POST. Can it be that BIOS went faulty?I mean the chip itself?(there was no attempts to flash it).

It's a stupid remark but who knows it helps...
Maybe the CPU chip and the heatsink above it don't touch each other very well so the temperature rises massively when you boot the computer. If you really unplugged everything already, i think it's worth trying to take off the CPU fan + heatsink and check the cooling paste ( maybe add a bit if necessary).

There are no special beeps that could alert you?

I had a similar problem once and the cause of that was high mobo + CPU temperatures. But in your case i would also think it's the AGP card tbh.

Thank you Master_Vos

But this thing has temperature detection, and the fact that the fan spins up and stops after a while indicates that the CPU does not heat up at all.

I have read somewhere that ceirain HP laptops ha ve issues with BIOS and it has to be updated. Mine was not. And now that the BIOS chip can not be replaced without replacing the motherboard.... it looks like it is going to cost me an arm and a leg to get it going again. Thank you for the answers guys and gals!

BIOS update doesn't always mean they have to replace the chip ( unless it's a bad manufactured chip that is). Maybe HP has released a new version of the BIOS + a tool to flash it. Instructions should be on their site. Flashing the BIOS could solve the problem.

And i thought we were talking about an old computer that started to get issues?

I have a similar issue. When starting up my laptop, the power lights come on and the hard drive light flickers three or four times and then nothing. When I put a cd in, the cdwill spin a couple of timesand the hard drive light will fliccker again three or four times and nothing. Something that happens that typically doesn't happen before entering teh operating system is that I have to hold the power button down about fiveseconds for it to turn off. Befroe when it ran fine, I could just hit the button before getting to the operating system. I have a Compaq Presario R3000 Series latop.

Steps that I have taken:

Removed and reinserted the hard drive
Removed and swapped slot 1 and slot 2 RAM
Tried to start up with only AC
Removed the AC and Battery and held down the power button for a hard reset
Started up without a hard drive (thelast time I accidentally did that, I at least got a "Can not find book disk" error.

I was told that it might be the BGA RAM on the video card, but after that I was told that the graphics card shares the computer RAM butupon loking at the specs it does appear that the graphics has its own RAM. Iam still at a loss for what and where the BGA RAM is. Also, in looking at my chip and heat sink, when I took the heat sink off to reseat the cpu, I noticed that the contact paste was solid and brittle. Is changing the graphics out hard to do? Or should I replace the chip? It did run a bit without a fan a few months agofor a couple of weeks. Any input isgreatly appreciated.

Product Name R3410US
US Product Number PR472UA#ABA
Microprocessor Mobile AMD™ Athlon™ XP-M Processor 2800+ with PowerNow!™ Technology
Microprocessor Cache 128KB L2 Cache
Memory 512MB DDR SDRAM (2 x 256MB) at 333MHz
Memory Max 1280MB DDR SDRAM (1 x 256MB, 1 x 1024MB)
Video Graphics NVIDIA GeForce 4 420 Go
Video Memory 32MB DDR (dedicated)
Hard Drive 60GB (4200RPM) Hard Drive(i)

I would not mess up with the hardware too much if i were you... Have you tried already to disable the graphics card in the BIOS ? Maybe when its turned off you can boot normally.