System is not recognized by monitor

Question

for about a month, the system would freeze after about 6 to 8 hours of use. The screen would be filled with small rectangles and the only way to get out of this was to turn off the power at the front botton blue ready light, pushing for about 4 seconds. The monitor would say "sytem will turn off because of no RGB signal, andd sure enought the monitor would turn off. It would work again the next day for 4 to 8 hrs andd then same problem. This went on for about a month. Now it's totally not working at all, as soon as I turn the power on the fans come on at full speed, the green light is on in the back and the blue light comes on right away in front, where normally it would be orange until the system was ready to go and the blue light would come on. I have done the hard reset, pulling even the power cord for a few seconds and as soon as I plug it back in the computer tower, the blue light comes on right away and the fans are at full blast. I have had this computer for over 10 yrs, never changed anything in it. Just opened it up last night and vacuumed it very carefully with power cord off. Could it be that the cmos battery is dead and would this create this kind of problem? I have never replaced it. And if I do replace it do I have to do anything to restore the computer to it's operating form? I am not a computer wiz but I am fairly handy and good with instructions.  Would appreciate your help. Thanks. JP

Answer 1

Hello @paparaut ,
I understand that after 10 years your monitor is starting to have issues with recognising your computer. I am providing you with some steps you can try below:
Step 1. Unplug the power cord from the back of the monitor and the wall
Step 2. Hold the power button down for at least one minute
Step 3. Plug the power cord back into the monitor and then into the wall outlet (not a power bar or surge protector)
Step 4. Press the Menu button on the monitor
Step 5. Navigate to the Factory Reset option and select it
Step 6. Try different cables between your computer and monitor.
If the above steps did not resolve your issue you can try the monitor on a computer or other device to see if the issue persists. Please call our technical support at 800-474-6836. If you live outside the US/Canada Region, please click the link below to get the support number for your region. http://www8.hp.com/us/en/contact-hp/ww-phone-assist.html
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