WORKED FINE YESTERDAY. I JUST TURNED IT ON AND IT MAKES A FEW SOUNDS LIKE IT IS GOING TO BOOT UP BUT STOPS. LED LIGHTS ALL COME ONE. POWER, WIRELESS BUTTON, BUT KEYBOARD DOES NOT RESPOND. HARD DRIVE OR RAM?
Having had unusual faults with batteries in these models from similar issues to having no power at all, the least time consuming test would to be remove the battery and power it only from the AC adapter. If it boots okay, the battery is faulty. Next I'd try to access the BIOS, Keep tapping [F10] key straight after pressing the power button and see if RAM and Hard Drive is recognized. If this fails, there may be a motherboard/RAM issue. Then if there are two RAM modules, take them out and insert each one separately, though remove the power and battery before attempting this procedure so as to not risk damaging the RAM modules, I usually keep at least one finger grounded on the metal regions to avoid a potential difference between my body and the RAM. If it boots with one RAM module and not the other, the issue is obvious. If it doesn't boot with either RAM module into the [F10] BIOS, it is likely the motherboard/CPU has failed. IF RAM is okay and then next would be the Hard Drive: With hard drives, sometimes they can mechanically fail, from overheating and bearing failure. This often presents itself as running fine one day and suddenly fails to fire up the next. You can often hear the drive failing to start spinning, though the CPU cooling fan is often too noisy to hear if the drive is spinning or not. Two techniques are useful, take out the hard drive and very gently spin/shake it back and forth manually in the same plane as the disks would spin, normally, sometimes this can free up a stuck drive, if this does, back up all your data while the drive is running and replace it. If this fails, sometimes we can get a failed drive to run by wrapping in a plastic bag and putting in the freezer for an hour. If this works, get what you can off it quickly and replace it, as the control circuits have been cooked.
Note: On all notebooks, air circulation is poor, they should all be placed on flat surfaces, never laps or soft cloth surfaces like on beds, as these block the fine vents and introduce fluff into the unit.
They should have compressed air forced back into the CPU cooling vents regularly to prevent a buildup of a blanket of dust which cooks the CPU and support chips. Keep the cooling system free and clean to get the best out of your notebooks.
SOURCE: HP Pavilion dv4 not booting up, has blinking caps and scroll lock
Compaq and Hp are having issues with several models, My wife just got hers repaired free out of warranty. Go to copaqs website, look up your model and see if it is one they are offering free one time repairs on. Wife's computer was doing same thing, they replaced the motherboard. Took about 2 weeks round trip . Good luck
SOURCE: HP Pavilion zd8000 wont turn on, just blinks on and off
They are trash period and even though its an old post I feel the need to complain about this model.. Video circuit issues, Adapters, And charging circuit problems are coming out of the woodwork for these monsters.. If you go to www.hpnotebooksettlement.com you will find out who we are and how we got involved.. (Althogh we are not listed).. (Better this way..
Ken
SOURCE: HP Pavillion dv9700 won't power up
Try removing the battery and using only power cord to turn the laptop on. If that fails, try turning it on without power cord, just on battery.
If none of those work, then most probable cause of your problem is motherboard. Hopefuly you are either under manufacturer warranty or you have extended warranty with your vendor where you've purchased the laptop.
If your laptop turns on on power cord, but without battery, then battery is the problem. Also, if laptop turns on when it's only on battery but it doesn't when you plug ac cord in it, then the adapter is the problem.
SOURCE: HP DV6500 will not boot
Motherboard is definitely bad then, you went thru all the steps that I would have done. Sounds to me like the voltage that is going thru the motherboard isn't being regulated properly cause some chips on the motherboard is bad and when there is to much voltage going thru then the laptop shutting off is a safety mechanism in place to avoid chips burning out on the board. Motherboard would have to be replaced.
SOURCE: hp laptop,wont boot.no screen ,no bios,just lights above keyboard
Its obviously Bios problem. YOu should contact Hp support
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