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there are several reasons why picture of crt monitors did not display good picture. if your monitor had horizontal line at the center of the screen?...the faulty is in the vertical deflection, check the vertical oscillator also the fusible resistors & capacitors around that section. if there had vertical line at the center of the screen?..check the horizontal deflection, horizontal output transistor also check the YOKE.
most likely capacitor problem as these caps only have a 25000-40000 hour life span. when you do replaace the monitor , turn it off when not at the computer. even though it goes into sleep mode there is still a current running through the unit cuz if you move the mouse or hit button on keyboard display wakes up. I know this because I have done boad level repair on panels
Tryconnecting an external monitor to the laptop. You may have to select the videooutput to display on the external monitor by holding down the blue key and pressing the blue CRT/LCD (located on one of the keys, likeF8,F9, etc..). If the problem occurs on the external monitor with the batteryor AC power, then you have a problem with either the video card or motherboardin the laptop. If the problem does not happen using the external monitor thenyou laptop's LCD display is going bad.
If it is unable to boot up, its probably not a monitor issue, although it could well be without examing it. If your good with computers, you can take it apart and look to see if the lcd ribbon cable is torn or damaged. If you don't feel you can do it, contact dell support or take it to your local computer repair shop. I hope this helps!
you need to replace switching transistor 2SC5707 in the Power Inverter Board.
This parts is used to fix Some dell and hp lcd monitor.
DELL E172FPb, E173FPb. HP Pavilion F1703, Pavilion F1503.
If you can't get this item to work let me know, I can help
I have fixed a lot of these monitor with no problem.