Try booting a recovery, repair, diagnostic, or LiveCD or a floppy. If you can boot from one of those, then your problem is the hard drive. Could be hardware or data corruption.
You may have to enter BIOS setup to change the device boot order. Your user manual or the display usually tells you what key(s) to press to enter setup (if needed).
After you try that, let us know. If you don't have a bootable CD or floppy, then let us know and someone can steer you to appropriate freeware like Knoppix, MemTest, etc.
Also, don't be so quick to disassemble at that level. Sometimes the laptop keyboards don't require any screw removal to take it from the case.
Go to the HP/Compaq website and look for the maintenance manual. I was able to find a manual for a really old Presario 14XL345 laptop there just a couple months ago. It provides extremely detailed dis-assembly info.
I've read the V3000 has an nVidia video card. In some cases where a computer won't power-up even to the first diagnostic output, the video card is either mis-seated or failed.
edit to add-
Okay, now I'm reading conflicting reports as to whether the thing has integrated video or a pluggable video card. Obviously, if integrated vid, then can't try reseating or replacing a video card.
I also just read that the V3000 seems to have a known problem coming back after being sent into suspend or sleep mode. Whether or not you've been using that power saving mode, you might try searching on V3000 problems with returning from suspend/sleep modes.
There was also a report that the V3000 runs into a similar problem if you let it run until the battery runs-down and it automatically shuts itself off.
BTW, in my opinion, the power-saving modes are generally more trouble then they are worth. Laptop manufacturers just can't seem to get ACPI right. I either keep my PC running or shut it down completely.
edit to add- There's hope.
I just read a user had what seems to be an almost identical problem on the V3000. She unplugged the power and removed the battery for 24 hours. When she next tried to boot the system, the screen worked and she was able to get to the BIOS setup panel by pressing F10. Windows still wouldn't boot however. So, she then pressed F11 to load the windows cd, performed a "Windows repair" and it is now working. She did however, lose work in progress at the time of the initial failure.
See if you can get that far, and if it doesn't boot Windows, or the repair action doesn't work, we can go from there.
edit-add info that other user finally solved her problem
In addition to the info from the edit in my last post, there's this info. It should be noted that the person who had the same problem fixed her problem (using the no battery for 24 hours + unplugged, followed by Windows Repair) and did NOT install or have this hotfix installed. However, she may run into the same problem again as there is a problem like this known to be caused by an over-heating issue with the V3000.
In addition to this hotfix (if needed) I'd recommend thoroughly cleaning your cooling subsystem with compressed air. After you do that, you should also cafefully clean your CD/DVD drive in a manner consistent with manufacturer's recommendations for that action. (Some advise against using a brush type of cleaning disc, and others advise against using compressed air, both for the concern that it could change the alignment of the optics)
HP has identified a hardware issue with certain HP Pavilion dv2000/dv6000/dv9000 and Compaq Presario V3000/V6000 series notebook PCs, and has also released a new BIOS for these notebook PCs, version F.39 for dv2000/V3000, and version F.3D for dv6000/dv9000/V6000.
If your computerís product number is listed above, and the notebook PC experiences one or more of the symptoms listed below, contact HP during the Duration of the HP Limited Warranty Service Enhancement to determine whether you are eligible for a free repair.
The following symptoms apply to Pavilion dv2000 and Presario v3000 notebooks:
*The notebook does not detect wireless networks and the wireless adapter is not detected in the Device Manager.
*There is no video on the computer LCD panel or external monitor.
You can download and install the BIOS update yourself, but if under warranty and you're inexperienced, it's better to let HP do it. An improperly applied or interrupted BIOS update attempt can turn your laptop into a paper-weight.
(Sorry for the multiple edits. I'm once again on maximum pain killers, and I'm trying to make sure my words are clear and complete as possible. It can take me a few tries.)
Another call for help here too! I started having reboot issues following lid shut/hibernation soon after an automatic Vista Update, so I thought maybe it was an OS issue. When I forced a reboot, I would see the lights light up, the DVD drive spin for a second, and hear the fan start up, but a completely black screen, no way of reaching the BIOS, nothing. I'd have to force reboot anywhere from 2 to about 50 times to get it restart.
I avoided hibernating for a while but accidentally left my laptop unplugged for the day. When I got home, it had powered out and wouldn't start up when plugged in again. This time, I don't even hear the fan starting up, or it's very faint. I tried sticking my recovery disk or the Vista repair disk but to no avail.
Any ideas would be amazing at this point. Thank you!
Guys im dealing with the same prob. The v3000 wont boot from a restart, hibernate, suspend and poweroff. So i basiclly wont start ever. You have to manually press the off botton for it to shut down and then just go ahead and try and turning ot on manuall till ot final boots. Ive tried reinstalling vista, and still have the same problem. Another funny thing is that when you plug the thing it just turns on. Im downloading ubuntu and see if that helps but im guessing we have a hardware malfunction here??
This happens to me on my V6000 2 or 3 days ago. The cause on mine is obvious by Windows Vista SP1. I had read the above solutions and trying it now. And will post a result if mine works.
On one post above a guy is same using Vista, and i diagnosed Vista have some sorts of Power Management API problems that can possibly give power surge on internal system. Which is high risk to blow up the mainboard. But my guess is it messed up my V6000's BIOS, the system itself don't know how to boot. I only hope the surge doesn't hardmod my BIOS data. Otherwise i'm screwed for a new laptop or mainboard replacement.
And what i hate the most is Compaq have the Limited Warranty Enchancement program to free repair most models, my model is one of them but the P/N number is not listed mean i don't get a free repair even i get the same model and problem!
Anyway its Compaq/HP's mainboard design faulty.
EDIT: 3th day, power up my laptop but no use.. laptop is completely dead.
I experienced the same issue with my v3005AU LED's on and DVD active but no HDD or other sighns of life.
Finaly got the thing to boot and did the BIOS upgrade, worked like a charm after that. Until I closed the lid while beeing in Fedora Core 8. This sendt the laptop into hibernation or sleep, idk. but now it wount wake up again, just like before the BIOS upgrade.
I'm figuring it could be fixed by resetting the BIOS? but I'm no Laptop fixer, Stationary PC is my thing
How do I reset the BIOS on this thing?
I came across a weird thing while trying to get the thing to boot. If I hold down he power button while i plug in the powercord (with the battery not in), the laptop starts and the led on the touchpad flashes orange-blue. If i turn it of and on again, there is a LOUD beep and the flashing touchpad LED.
Hi, I just went through the same ordeal, actually more than once. First, my computer crashed on me.. so i reinstalled the OS, did the whole repair thing and lost everything (nothing important) Worked well for about a couple months till it crashed yet again.... got it working for a week after doing a reinstall again... and finally it just would not start up. I saw the xp screen but it wouldnt go past that. In the end, I tested my hard drive (100gb hitachi travelstar-came with the comp when i bought it a year and a half ago and it failed 2 of the hd tests using Seagate Seatools, took it out, tested it in an external enclosure and sure enough i couldnt access the drive... I bought a Seagate HD and installed it, and now it works.. so I assume its just a weak or not a very good hard drive, as I am very careful with my notebook... not impressed with HP thusfar... Hopefully you guys find out what your problems are... if you guys are having problems connecting to a wireless network or your screen doesnt even turn on, there is a recall, and hp will fix it for free. Check it out by using Hp updates or access the hp site. Only problem is, is that if I do get problems with that in the future im screwed, since hp will only fix it, if it is a problem now...
Hey, I have the Compaq V3000 and have also been experiencing the same symptoms that is reported by HP. I still have to get it checked. But I happened to figure out a work around to make my laptop work.
Power off system (if it is on) -> Disconnect AC mains (battery can be kept intact) -> Press power button (at this point, LEDs glow with no display) -> Connect AC mains -> Reset system (press power button for 3~5 seconds) -> Press power button again -> System boots successfuly.
This procedure has been working for me always (100%)!!!
Do let know if this works for everybody. But don't fail to get it repaired by HP! There's the second symptom of wireless networks not being detected that there is no work around for as yet.
Hey, I've been working for this problem for few month now. Got something that may help you. You will still manage to get the display. I'm pretty sure you who got this display problem able to power up you machine using the media touch button (it's weird but the problem is actually related.) try to use that touch button to power up your machine. It probably wont give any display for few times try.. but it will. After you manage to get the display, check your BIOS version, if you still using BIOS version F2.1 or F39.. update it to F3C (latest). It helps. If it's not helping .. then try to replace the upper cassing.. to be exact, the top cover that comes with the touch panel button and the power button. Found out that the Media button and the power button is un-directly related to the LCD connection to mainboard. This will help.. I hope.