5500 hp monitor

Have you made any hardware changes to your PC? I would suggest you attempt to start your PC in safe mode by pressing F10 during boot up and troubleshooting from there.

Do you see anything on the monitor screen? Does the tower make any beeping noise or clicking noise, or does the fan tries to start up when you power the computer on? Are the cables connected properly?
If you see anything on the monitor screen, or if you hear a beeping sound, let us know so we can diagnose further.

There are several reasons why a computer will lock up. You can view the HP help file HERE for your computer. You can also view the beep codes for your computer (yes, those noises mean something :D ) HERE. The instructions are step by step for your machine and should be fairly easy to follow.

Good Luck

beep noise indicates that the RAM is not detected.... TURN OFF computer....remove power supply....open the cabinet and remove the RAM.... clean it using a soft non-moist cloth...plug it back.... your computer will start... still if it is not starting, then the RAM might have gone faulty, try to check with other RAM.....

If it is making this noise when it is powering on and fails to get to the BIOS screen where all the white text flies up-- the PC suffered a hardware issue.

Power it off and leave it powered off for eight hours. Power it back on. If it powers on without the beeps, it was a heat related issue and will eventually crash again until that is addressed.

It should make one beep. That means it passed the self-test.
If there is nothing on the monitor (is the monitor light green or yellow?)
then the monitor is bad.
I suggest you try another monitor to be sure. Borrow one from a friend.

That beeping noise may be due to over heating.
Most machines today have a temperature setting that will turn the machine off once the temperature reaches a certain point.
Safety feature to avoid damaging your cpu and components.
The shut down and restarting allows the CPU to cool down briefly.
Thus allowing you to start the machine again. Usually it will shut down again once the temperature threshold is again reached.
Good test is let the machine sit for 30 min. If it immediately starts up and shuts down a few minutes later. Heat build is usually the problem.

Typically this is due to heat sink or Fan on the computer CPU.
Check to be sure both are connected to the CPU and functioning.
If you have a fan on top of the heat sink above the CPU. Make sure it is working correctly. Dust build up over time will eventually kill the fan bearings or reduce airflow. Heat sink can and will become clogged with dust also. Replacement fans are easy to find. Heat sinks are even easier to clean.
Depending on your machine and CPU position replacing the fan can be a challenge. But can be done in a few minutes with minimum tools.

Each bios has different post codes and it is difficult to tell what is happening with out knowing the bios of your particular machine. Listen for the beeps and check your computer manual.
You can also google for this. Here is a web site that lists a few bios P.O.S.T codes.
http://www.computerhope.com/beep.htm
Once you know the beep sequence you can look it up. Usually points to the problem and you can go from there.

Good luck!

To isolate the issue.please connect the notebook to external monitor with the help of VGA port.(Blue PORT) on the notebook.if it good with out any lines.you need to fix the LCD screen of the Notebook.

Beep codes instructions:
http://h10025.www1.hp.com/ewfrf/wc/document?lc=en&cc=us&docname=bph07107&dlc=en&product=362754
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Monitor clicks, pops, or makes other noises. Issue: Monitor clicks, pops, or makes other noises.
Cause: This issue could be caused by any of the below possibilities:

1. Monitor degaussing.
2. Monitor changing resolution.
3. Monitor syncing with the video card.
4. Monitor warming up.

Solution: Noise when turned on or off It is normal for standard computer CRT monitors to make a click, pop, crackle, hum, buzz, or other type of noises when they are first turned on or turned off.
Noise when monitor goes into standby mode When the monitor enters a "standby mode" or "power savings mode" this is similar to the monitor being turned off. It is completely normal for the monitor to make a noise when the monitor enters this mode.
Noise when opening Microsoft Windows or other operating system or when opening a game When a computer opens its operating system, for example, a computer opening Microsoft Windows or when a user runs a computer game it is very common that the monitor will need to switch its resolution of the operating system or game. When switching resolutions it is normal for the computer monitor to make some type of noise and/or for the computer monitor to flick or flash.
Noise during normal operation If the computer monitor click, pops, or flashes while it is being used this is not normal operation. It is very likely that the monitor may be failing or a component within the monitor has already failed and could also potentially be a fire hazard. We highly recommend that the monitor be repaired, replaced, and/or looked at by a qualified technician.
Additional information:

• See document CH000302 for additional information and other noises that may come from