Bought a compaq 1260 @ a yard sale only one problem i have found was it won't turn off. it shuts down and tells me i can turn off the computer im not sure how this is done. computer did not come with any manuals. I have to pull battery to turn off.
I have a Compaq 1275 with the same problem. You can actually turn it off without removing the battery by holding the on/off button for more than 4 seconds. This actually works for any computers (it is like a reset button). Hope it helps.
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if it is a HP computer, and many others, you can turn on the computer and immediately start tapping the F11 key,(before the main screen pops up) - then follow the prompts and allow plenty of time - this takes awhile. this puts the computer back to the original Factory Settings like out of the box. this is a full system Recovery I had a friend with same issue, bought really nice computer but the guy didn't know the password (so he probably bought it the same way!) she did the F11 and fixed the problem
You can remove or change the Window's User or administrator's password and privileges. You need access to a computer with Internet access to download the Hiren's Boot CD and burn it onto a CD. Then insert this CD into the laptop/computer and boot up the laptop/computer with the Hiren's CD and follow the instructions. There are very useful utilities CD and it a Linux boot CD which contains quite a lot of Utility programs including a password removal program. Click on one of these links to download HIREN'S BOOTCD :- http://www.hirensbootcd.net/http://126.96.36.199/
It is probably not shutting down because there is a program running that will not shut down. Unnstall programs you no longer use and do a virus scan, often the programs that refuse to shut down are malicious. Holding down the power button for 5 seconds should shut down the computer (it signals the motherboard to power down). As for the black screen, not enough detail for me to say.
1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the computer on, and then shut it down through the operating system. 2. Disconnect all external devices connected to the computer. 3. Disconnect the power cord. 4. Remove the battery pack by following these steps: a. Turn the computer upside down with the front panel toward you. b. Slide and hold the battery release latch 1 to the left. (The front edge of the battery pack disengages from the computer.) c. Lift the front edge of the battery pack 2 and swing it back. d. Remove the battery pack. 5. Remove the RTC battery from the socket on the system board. 6. Wait approximately 5 minutes. 7. Replace the RTC battery and reassemble the computer. 8. Connect AC power to the computer. Do not reinsert any battery packs at this time. 9. Turn on the computer. All passwords and all CMOS settings have been cleared.