Solved Black Screen on startup: Monitor or windows broken?

[TheArkerportian]

Hello, I have a sort of strange problem with starting my Win7 PC. Strange in so far that when googling it, nobody else seems to have experienced this. While the PC seems to boot normally, it takes some ten minutes until the screen turns on. By then the Windows login screen is there, or I can also type the password and hit enter while the screen is still black, and find myself on the desktop as soon as there is a picture. From then on the PC works flawlessly. I can also turn the monitor off and on again and it works immediately. From other threads of people having similar but not identic problems, here are some solutions I've tried without success already

-Updating graphics card driver
-Unplugging internet cable and USB drives during boot during boot

Does somebody have a clue what else it could be?

Greetings, Mike

 

[MrWhoopee]

Try this, while the machine is booted up and the monitor is working, turn off the monitor and leave it off for about 15 or 20 minutes. Then turn it back on and see what happens.

 

[andrew129260]

1.) When did this start happening? Was it always like this?

2.) You can make sure your system is up to date by using the find my product button here:

HP Drivers and Downloads for Printers, Scanners and More | HP ® Support

 

[TheArkerportian]

Hello,

It started round last Friday. I bought this PC second-hand about 6 months ago, and so far it worked fine. There also seem to be a problem with my router: I can't receive calls by telephone anymore as it seems. Phoning someone else works though. Not sure if that could be related to the monitor issue, but they started at the same time, more or less at least.

Thanks for the replies so far, now trying to get that HP support program to work. Won't recognize I installed the HPsupportframework...

Scannow found no problems btw.

Greetings, Mike

 

[TheArkerportian]

OK, when I switch off the monitor when it's running and turn it on again, it works as it should.

 

[andrew129260]

Try to replace your video cable, and make sure your graphic drivers are up to date.

 

[MrWhoopee]

OK, when I switch off the monitor when it's running and turn it on again, it works as it should.

Just to be clear, did you leave it turned off for 15 or 20 minutes before you turned it back on?
What type of monitor is this, an old CRT or flat panel (lcd or led)?
What happens when you do a restart of the computer?

Do you have access to another monitor you could try?

I am leaning towards failing hardware (monitor or video card), since everything works properly once it is "warmed up".

 

[TheArkerportian]

Well the problem is solved, sort of. The monitor finally didn't start at all anymore, got a new one now.

Thanks everybody.

 

[andrew129260]

Glad to hear it