Okay, so, in a short summary... The laptop boots up only sometimes. I switch on the AC power and it shows that the battery is charging. When I switch it on, it shows the HP logo and then goes black. Sometimes, it loads Windows and goes black. Sometimes it shows the pointer for a while after that before going black.
If I shut it down directly, it shows the options to start normally or repair. If I switch it off after booting Windows and going black, it shows the options for Safe Mode.
I have also noticed that the battery stops charging in this process, and the next time I restart the AC power, it shows it is charging. I noticed this problem and tried to remove the battery at startup. After that, it booted up quite correctly. Then I slid the battery in.
I would try the following: 1. Remove the battery completely. If the computer boots properly several times in a row, then the battery may be causing the power supply to do strange things. 2. If you have experience removing laptop components, try removing the hard drive. Because you say the screen goes black (I assume the system powers off) sometimes after the HP logo, I doubt its Windows or a software issue. 3. If HP has a diagnostic CD you can boot to, try that. 4. It may be the power supply acting up. If it charges the battery, and if you can boot to Windows with the battery, try getting a new power supply. 5. Otherwise, it may be the motherboard of the laptop.
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Try a hard reset. Sometimes it works and is always the first step to take.
Remove the battery and the ac adapter plug from the laptop.
Press and hold the power button for forty seconds.
Install either the battery or ac adapter power and press the power button toattempt a boot into the OS.
One of the things that are not said to owners of laptops, is that you should run the laptop on the battery to run it down and charge it up to maintain the batteries capabilites
Unfortunately, the way it works sometimes, it can overlaod your AC adapter.
Try booting up with your system with the battery removed from the laptop, the battery should be near the front bottom with 1 03 2 slide to releases to allow you to remove it.
If your laptop boots up to Windows and seems to be OK, then it was the battery, you would then have to leave it out of the laptop or purchase a new one. Does not affect anything to run without the battery.
It you still have then problem, it may be the adapter itself, you would have to have it tested to be sure. If the AC adapter ckecks good, then it would be either the power jack in the laptop has somehow worked loose on the mainboard of the laptop or hopefully not a power supply or other component failing.
Remove the AC power (charger) and then take the battery out. Plug in just the AC power supply and turn the laptop on, see if it boots up and shows a display on-screen. If it boots let it boot up and then shut it down as normal. Reinsert the battery and try as normal. If you still get a blank screen can you then tell me if you get any post (splash) information like the Compaq Presario logo before it goes blank.
Try a hard reset. Sometimes it works and is always the first step to take. Remove the battery and the ac adapter plug from the laptop. Press and hold the power button for forty seconds. Install the battery and ac adapter .Now press the power button to attempt a boot into the OS.
If that doesn't work then remove the hard disk to see if it gets past the splash screen and the BIOS whines that it can't find a boo-table OS. That would indicate a hard disk failure. Also try to remove the memory module(s) from the DIMM slots and then reinstalling them. That reset the modules and cleans some oxidation off the module pins (if there is any)
power button switches are usually very reliable and very unlikely to fail. However, sometimes the button that presses on the switch can become stuck in the on position - if it is stuck in that position the mboard cannot boot - make sure it isn't stuck. next check the AC adapter is working and is capable of charging the main battery? Most laptops will not boot when just the AC adapter is connected, and the main battery must be capable of being charged to at least a minimal level and be charged to at least that level in order for the AC adapter to work to help boot the computer. hope this helps
If the notebook doesn’t respond when you turn it on
• Connect the AC adapter.
• Reset the notebook by inserting the tip of a paper clip into the reset button on the
bottom of the notebook. Then press the power button to turn it on.
• If the notebook still doesn’t respond, remove the battery and AC adapter, remove
any PC cards, and undock the notebook if docked. Then plug in the AC adapter
again, and reset the notebook using the reset button.
If the notebook won’t boot from battery power
• Make sure the battery is properly inserted and fully charged. Check the battery
charge by removing it and pressing the pad on the side of the battery. The lights
show the charge level.
• If available, try another battery.
If the notebook won’t boot from the floppy disk drive
• Make sure the floppy disk drive is selected as the boot device.
• If you’re using a USB floppy drive, use the BIOS Setup utility to make sure
Legacy USB Support is enabled. If your notebook also has a built-in floppy
drive, use the BIOS Setup utility Boot menu to make sure the USB floppy drive
is the first device under Removable Drive.
If the notebook stops responding after booting
Check whether you are connected to a TCP/IP network with no DHCP server. This
can cause a long delay at startup because DHCP is enabled. Contact your network
administrator to determine the proper TCP/IP configuration
***IF THE NOTEBOOK HAS POWER BUT WONT BOOT INTO OPERATING SYSTEM-
Press F2 when you start it to enter BIOS to check your BOOT ORDER to make sure your HD is listed first on the list.
If it is not listed remove it and reinsert it and then try again.. GREAT LUCK!! Please Rate Me, K? Thanks- Lucky4lynn2
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It's not necessarily hardware related, can you boot into Bios? If you can try to boot info safe mode, that's F8 for most PCs. I would suspect something with your motherboard drivers, then again it could just be your battery. Not all laptops will operate with the battery out, there is some kind of failsafe to prevent overheating in some, because without a battery the power supply can be fried sometimes.
Okay, I had that problem with my HP less than a minute ago.
Maybe it is the same problem. See if the battery light comes on. Press the power button again and again if it doesn't start, for some time. It may show the boot screen and hang. Now, the battery must be charged. Shut it down directly and switch the AC off.
Now, switch it on and see if the battery light comes on. If it does, it is the same problem as mine. Now, turn the PC over and remove the battery carefully. There may be switches for that.
Now, plug in the AC and start it without the battery in. If it does, you're done. Now, plug in the battery again.
the first thing to make sure of is that the ac adaptor cable is not having any partial contacts ofany kind whereby power gets into the laptop irregularly.this could have adverse effect on the circuitry.
it is not enough just checking the output of the ac adapter by a meter.try straighten the cable from the adapter and check the meter for voltage fluctuations.
if the above is okay then the problem could be on board leve.