Vintage Philips 4BM2797 CRT BW monitor repair/tuneup

mitchw

Senior Member

Join Date: Dec 2016

Posts: 136

Country: Slovenia
#1

Vintage Philips 4BM2797 CRT BW monitor repair/tuneup

01-12-2024, 12:39 PM

I have a Philips 4BM2797 black and white VGA CRT monitor that is very dim. If I put the brightness at medium (indent at the pot), the text is barely visible in a moderately lit room.

I looked around for a service manual, but was unable to find one. Also there are no G2/Focus adjustments on flyback...
There is a row of adjustment trimmers, but they aren't marked..

Anyone has any info about it?
Thanks
Tags: None
mitchw

Senior Member

Join Date: Dec 2016

Posts: 136

Country: Slovenia
#2

01-12-2024, 12:54 PM

Anyways, I marked all the pots with sharpie and started turning them slightly. The one marked 3537 is clearly the G2 voltage control as I was able to crank it up so the retrace lines started to show up. This is the third one from the rear side...

Now the image is much brighter, and still very sharp. So most likely the tube is in a pretty good condition still
Comment

Previous template Next

Philips 288P6LJEB/27 monitor PSU outputting 8V instead of 12V

by logocar3

Hello,

I am having problem with fixing Philips 288P6LJEB/27 monitor PSU, board number 715G6457-P01-000-0010.

Data:
- Schematic is attached to post
- Photos can be found on flicker: https://www.flickr.com/photos/198547898@N03

Problem:
- PSU board have power outputs at 5.2V, 12V and 24V - board is correctly outputting only 5.2V (correct), and not 12V (without load only 8.16V) or 24V (without load 0V)

State of PCB / monitor:
- Bought defect monitor from a company auction
- There were some attempts to fix...
- Channel: Troubleshooting Computer Displays
06-19-2023, 11:40 PM
Philips 243v5lhsb00 Monitor Picture too bright

by Schwoin

Hey everyone,

the picture on my philips monitor looks way too bright so that black appears grey and colors also seem too bright.

While i tried to tilt the screen a little bit while it was displaying a picture, i´ve noticed, that there appeared some purple pixels. In the following picture
you can see them on the top half of the photo.

At a certain point during the tilting, the picture looked normal again but as soon as i laid it back down, the purple pixels were gone and the picture was bright again.
...
- Channel: Troubleshooting TVs and Video Sources
03-21-2023, 12:40 PM
AOC AG493UCX 49-inch monitor - Firmware request

by wattage

Hello Badcaps Community,

I purchased a preowned AOC monitor that is not working and out of warranty. It was sold as not working. I am looking for guidance on self-repair. In particular, I am after the firmware for the monitor. At the end, I have included monitor model information and links to pics and vids of the issue.

The problem is that it will not display a picture on any of its inputs. And the on-screen menu does not appear. The power button works properly. It powers on with the remote as well. But the on-screen menu does not appear, even when not connected to any...
- Channel: Troubleshooting Computer Displays
07-13-2025, 04:41 PM
HP 27es - LED monitor - Monitor Flashing On - Off

by ant3202

Hi Everyone

Lately I am experiencing the deja-vu incident on one of the led monitor like this.
https://www.badcaps.net/forum/troubl...lashing-on-off

The monitor is HP 27es LED Monitor
https://h30434.www3.hp.com/t5/Deskto...e/td-p/6804692

The monitor will randomly blackout and display no signal and will recover again.
Sometimes need to power and off again to restore the display but...
- Channel: Troubleshooting Computer Displays
03-20-2025, 07:30 PM
LG 23MP55HQ LED Monitor turns off after a few seconds or flickers.

by Rick_1234

Good evening, gentlemen.

I have a problem with my monitor. It turns off after a few seconds or flickers. Shining a flashlight on the screen doesn't show any image, so I guess it's not the "2 seconds to dark" I read in the forum.

To turn it back on, I have to press the power button twice. Then after a few seconds it turns off again or flickers. See video.
https://drive.google.com/file/d/1L6S...ew?usp=sharing

Things I tried

- Bought a new AC adapter thinking that was the problem but the problem...
- Channel: Troubleshooting Computer Displays
06-22-2024, 04:44 PM
Loading...
No more items.

Vintage Philips 4BM2797 CRT BW monitor repair/tuneup

Vintage Philips 4BM2797 CRT BW monitor repair/tuneup

Comment

Related Topics