Having problems with your Compaq fs740 17" CRT Monitor ?

I have a compaq fs740 connected to an hp pavillion 760 thru the hd-15 connection. My problem is some of the monitors settings are corrupt my screen doesnt adjust width as well as other functions dont adjust properley my screen is curving ) ( and wont adjust proper on the sides.Ive been an electronics communication technician for 22 years. I do understand schematic diagrams and circuitry. However I dont have much monitor experience.As I understand it this monitor is controlled by frequency? so t


Answers :

Hi.

Frequency has nothing to do with this. When frequency is causing the problem, you get no picture, or lines scrolling on the screen.

If the screen is curving, and does not adjust with preset, then the convergence ICs must be replaced.
The convergence ICs are two power amp ICs. They must be replaced. The resistors in the convergence circuit must also be tested checking continuity, then eventually replaced.


Schematics for your model are not available for free download.
Here Full service manual for fs740. a $5 fee is required before download:
Compaq FS740 CO1076 EQ770 Service Manual


Best regards.
Sorry to hear that you are having problems with your Compaq Monitor.

Let me guess; did you have the speaker installed on each side of the monitor? Is so, you are another victim or magnet damage to the screen.

The magnets from the speakers affects over time the internal grid on the screen and magnetize the coils that controls the horizontal size of the screen, that is why the image is affected and presents the "Pillow effect".

Some monitors have the options to DEGAUSS. Just get into the monitor menu, look for "degauss" (there is a U magnet in the icon" and select it. The screen will go crazy for a few seconds but can fix the problem.

If there is no option like that, then you have a difficult work ahead. Don't even try if you have no experience on Hi voltage from CRT displays.

Inside the monitor, in the back of the CRT, there are square magnets that are used to adjust the "squareness" of the image. That magnets needs to be adjusted. If some parts are already magnetized, there is nothing you can do about it. Removing the speakers doesn't fix the problem.

Good luck!

Repair Help & Product Troubleshooting for Compaq fs740 17" CRT Monitor

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