Replacing old crt monitor with lcdmonitor

Monitor horizontal lines problems usually caused by a defective vertical output/driver ic. A missing supply voltage to the vertical output ic may caused similar faults which is one horizontal line across the display. Dry joints and missing vertical output pulse from vertical oscillator ic also could contribute the same symptom. If you discovered that the protection resistor (usually from 1 to 4.7 ohm) open circuit or burnt, then replacing it won't solve the problem. The resistor burnt or open circuit was due to a short in the vertical output ic. Thus you have to replace the vertical output ic and the burnt resistor together before you switch on the monitor.

Did you set ur resolution screen setting higher than 1024 in ur computer panel resosulion setting?Yes than that is ur problems right there.CRT monitors modes are based on old technologies ,CRT monitors can't go up more than 1024 resolution setting.Setting resolution more than 1024 resolution for CRT models monitors will have thesse causes.The screen resolution on the screen will shrink and get smaller or will not have video resolution on the CRT monitors screens at all.Only LCD or LED monitors models can support and go higher than 1024 resolution setting has none of these causes.Time to upgrade for a new monitors technologies like LCD or LED monitors models.

The cable should be labeled with R (RED video signal), G (GREEN video signal), B (BLUE video signal), V (Vertical Sync signal), and H (Horizontal Sync signal), so you just have to match the plug to the sockets.
I hope it is clear explanations.

Pin Signal 1 Red Video 2 Green Video 3 Blue Video 4 Monitor ID - Bit 2 5 Ground 6 Red Ground 7 Green Ground 8 Blue Ground 9 [KEY] 10 Sync Ground 11 Monitor ID - Bit 1 12 Monitor ID - Bit 0 13 Horizontal Sync 14 Vertical Sync 15 N/C (Reserved)

If this is a CRT, then the horizontal deflection circuit is faulty.
The repair is generally not worth on CRT.

First try leaving monitor power cord unplugged for few hours, to discharge capacitors, sometimes this can fix minor problems.

Test also the display on different computers, you never know that this depends from a faulty video adapter.

More likely you will need to replace the screen.

You may need a driver for your PC as lcd differs from crt. They have a different signal input so update the video card drivers and you should be good to go.

we use the old CRT monitor made by motorola with TTL video signal and different vertical &horizontal frequency signals than monitor with vga signal.at now we can not replace crt with lcd .is there any interface to convert this crt signal to vga monitor signal for replacing the crt with lcd or vga monitor ,beacause this crt is discontinued and the quality of video is weak.if you needs the crt specification i will post it for you.thanks.

Vertical signal wire is yellow colour wire
Horizontal signal wire is White colour wire

REPLACE THE BOOSTER C 5,6nF-1600V

Most modern monitors use the Horizontal sync line to determine when to go to standby.