Re: DELL P1110 Trinitron - focus problems

I have tried to capture the problem on video but it's very hard. However on [URL="https://vimeo.com/user83603704/review/511587104/077e88c77b"][B]this video[/B][/URL] you should be able to see how at 0:05 the focus snaps back to normal. It happens on it's own without me touching anything. After this happens the image slowly gets blurry again until it snaps back to normal at a random moment. This goes on and on.

Any kind of advice would be greatly appreciated.Re: DELL P1110 Trinitron - focus problems

Hello, I am having problems with my Dell P1110 21" Trinitron monitor. It changes it's focus on it's own. One moment it's very blurry and the next it's ok. Sometimes it's ok only in the center of the screen, sometimes only in the corners. It's very random.

Adjusting the focus from the knobs on the FBT is not possible. I have also tried the monitor with an FBT and an A board from a working Sony FW900 but it's the same, so I'm guessing it's not the FBT or the A board.

I read somewhere that this monitor should have an auto focusing circuit controlled by an IC. I...

Re: New Members - please post your introductions here

Hi everyone! My name is Hristo, I'm from Bulgaria.
I am a CRT computer monitor enthusiast and I hope to find information on how to repair such machines and keep them functioning properly.