Question about Samsung SyncMaster 191T 19" Flat Panel LCD Monitor

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Samsung SynchMaster 191N Monitor stay on fine for 15-20 min after that it goes dark,, and power swtich thrun itself off, cannot turn on or off, unless I unplug power for few min and replug. Then stays ON for another 15-20 min and goes Off again. I thought of bad inverter, but since its cutting power not only screen liminessence, must be something else. Thx for anyinformation you can supply Regards

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  • Louis Ebert Sep 30, 2010

    archnqel928, If the "date of manufacture" is somewhere close to 2003 - 2004, then unit has had a very long life, and that is the reason retrevo .com lists 191N as time to retire!!! If need to repair is what you want to do, then a visit to YOUTUBE will help you decide. Lots of video clips there of owners/technicians doing repairs to their ccfl back-lit lcd monitors. One or all three (worst case) of these things will need to be troubleshooted!! 1. switch-mode-power-supply. 2.cold cathode fluorescent lamp electronic ballast circuit (inverter) 3. New CCFL's will need to be installed. Do some reading and note taking in the FIXYA PROFILES of "budmrtn" "buddymc" "12fixlouie" (me, pgs 20 and up) and follow links you find there. Could be that your unit needs only 1 solder joint for a key component to be resoldered because over the years it has become "thermal cycle fractured" and is now "thermally intermittant". 12fixlouie

  • archngel928 Sep 30, 2010

    Thx 12Fixlouie will look into this thermal fracture, you are right about the date apr 2003, it was one of the first model that had adjustable eight and rotating monitor. Always gave me satisfaction, This days there is no more square screen since everyone has moved to landscape. Will investigate on the repair and if its worth the expense.

    Thx again

    Arch

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If the OSD has display and after a min goes dark that monitor has 2 possible problem. 1. bad electrolytic capacitor from secondary power supply to inverter area or fault semiconductors around inverter area. 2. Bad CCFL or fluorescent lamp of lcd panel it may be reddish color.

Posted on Oct 02, 2010

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