Question about Gateway EV 500 (White) 15 in.CRT Conventional Monitor
I got problem to adjust the Horizontal side of the screen.The horizontal screen goes beyond the edge of the CRT on the right side of the monitor so I can see whatever is display on the right side. Hope someone had come across this problem and help me out.I had seen somewhere in the internet that I need to replace a transistor but I cannot remember what was the transistor and what location on the pcb.Thanks
I know I have seen thin lines in the past on older CRT monitors, these are usually wires which support the aperture grill. LCD is just a panel so this must be something different. What color is the line? It is probably an error in the scanning process.
Posted on May 10, 2007
The horizontal output transitor is always connected to the primary winding of the flyback transformer (via collector) and also to the horizontal deflection coil via an electrolytic capacitor. The most likely suspect for damaging the transistor is the fylback transformer. In some countries there are electronic stores that test flyback transformer by winding a few turns on the ferrite core and applying a test voltage. This test will only test the secondary. The primary winding is difficult to test for turn to turn short because the resistance is quite low and you do not know the 'good' resistance.
Posted on May 16, 2007
SOURCE: horizontal lines on Screen
Sounds like an inverter problem. If the power supply is internal replace the capacitors coming out of the voltage regulators. These are usually 1000mf and/or 470mf. If that doesn't do the trick look up the numbers on the 8-pin chips that drive the secondary transformers on the inverter to see if they are getting the right voltages.
Posted on Feb 20, 2008
It is the problem of horizantal section.Check horizantan hold transistor that is placed on hitsink of eht and two small transistors near iton pcb.and check horizantal yoke coil pins for dry soldring or low voltages.If thats are ok then change hori. &ver. deflection ic.
Hope this solution works.i am always for you
Posted on Mar 15, 2008
SOURCE: horizontal lines on my monitor
Lines on screens are usually caused by damage to the ribbons on the
actual screen face itself (something only a few professional lcd repair
shops can repair).
Sometimes caused by a bump, other times from over-wetting when cleaning, or dampness/moisture issues
The inverter-power board does Not control picture, It just controls the backlight bulbs and powering the video board.
Picture is powered from the video display board.
Posted on Jul 13, 2008
If you know what is a flyback transformer in a CRT monitor, then you'll
identify the horizontal section on the board. Refer to pics below for
Posted on Jan 22, 2009
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