- Joined Oct 30, 2008
Im using a Philips 104E 14 monitor. When I use it, it goes off suddenly (no even standby LED) and then it couldnt be turn on. When its working I cant control the horizontal width even with the control battens. I did following troubleshooting steps :
1. All dry-joints were soldered.
2.horizontal transistor TIP122 and H-Out transistor were replaced with new ones but problem still remain same.
3 .then in order to check the voltage at H-out transistor, 230V bulb was connected to the points where E and C of the H-out transistor were connected. (and H-out was removed from the board )When I turn on the monitor I found the bulb is blinking (this is abnormal and fixed voltage should come to the h-out Tr, I think.)
******After removing the H-out transistor amber color LED came up.
Can this be a Fly-back issue? Please guide how to troubleshoot this