Hello,
My Samsung monitor died a few months back and not being covered under warranty I decided to try and fix it.
The Problem:
I left my room and came back to find my monitor display blank. Upon closer examination I can barely see a display and only when I view it at an angle with a light. I unplugged the monitor and plugged it back in but no change or flickering of the display. After some research I concluded that the back lights were not functioning.
I disassembled the monitor (what a horribly tedious job that was!) and inspected the power supply and CCFLs. I could not see any obvious signs of 'bad caps', burnt fuses, loose soldering joints, but I did notice all 4 CCFLs were black at each end.
Long story short, I ordered new CCFLs under the assumption they had burnt out and replaced the old ones, a process which I never want to do again! The new CCFLs did not fix the problem and I am still experiencing a very dim display.
Now this leaves me with a few suspects that are causing the problem and before I spend any more money I need you guys to give me some input:
1) My soldering of the CCFLs to the old harnesses in some way was not sufficient to run the lamps or it damaged the replacements. I was VERY VERY careful with this process in regards to heating the connections.
2) There is a bad cap on the power supply. Although each capacitor clearly has no bulging or leaking that is visible, is this still a possibility?
3) After reading several threads on this subject I noticed that it is common for the CCFLs to light up for a few seconds before the inverter shuts off. In my situation, the lights remain off. Does this hint at the culprit?
I would greatly appreciate any help with this issue as my only option I have now would be to replace the power supply board completely at a cost of nearly 100$!
Please refer to this thread for pictures and capacitor info.
Thank you!
My Samsung monitor died a few months back and not being covered under warranty I decided to try and fix it.
The Problem:
I left my room and came back to find my monitor display blank. Upon closer examination I can barely see a display and only when I view it at an angle with a light. I unplugged the monitor and plugged it back in but no change or flickering of the display. After some research I concluded that the back lights were not functioning.
I disassembled the monitor (what a horribly tedious job that was!) and inspected the power supply and CCFLs. I could not see any obvious signs of 'bad caps', burnt fuses, loose soldering joints, but I did notice all 4 CCFLs were black at each end.
Long story short, I ordered new CCFLs under the assumption they had burnt out and replaced the old ones, a process which I never want to do again! The new CCFLs did not fix the problem and I am still experiencing a very dim display.
Now this leaves me with a few suspects that are causing the problem and before I spend any more money I need you guys to give me some input:
1) My soldering of the CCFLs to the old harnesses in some way was not sufficient to run the lamps or it damaged the replacements. I was VERY VERY careful with this process in regards to heating the connections.
2) There is a bad cap on the power supply. Although each capacitor clearly has no bulging or leaking that is visible, is this still a possibility?
3) After reading several threads on this subject I noticed that it is common for the CCFLs to light up for a few seconds before the inverter shuts off. In my situation, the lights remain off. Does this hint at the culprit?
I would greatly appreciate any help with this issue as my only option I have now would be to replace the power supply board completely at a cost of nearly 100$!
Please refer to this thread for pictures and capacitor info.
Thank you!
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