We had a problem on our flat tv 21 inches with model 21fx4al, when we press the power button to turn it on the red light flashes in more or less 3 seconds but no display at all. Please send us an immediate solution.
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If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/ Service mode entry, adjust and exit procedure to many popular brand TVs are given. Search the site by type in the "brand name" of your device, in the "Search box at the top right of the Homepage" to get gathered related posts.
the service menu can only be accessed with a "service remote" only available to certified Sharp service techs... special training and $350 required to become one... contact sharp for more info or find a repair man locally if you dont want to become one yourself... the training is a lecture
Factory on screen means that the TV is stuck in service mode (Durabrand
and more). The problem is fixed accessing Service mode and resetting to
factory default settings.
On Durabrand TVs problem is fixed using a programmable remote, entering service code on remote, and accessing service menu. Procedure is listed on TV service manual.Most durabrand use Menu and key combination 683 to access service mode. If that does not work, calll manufacturer number to get the key sequence to enter factory menu.
Take the Inverter Board out and check for Open windings on the 6 Transformers along the edge of the board. When you find one open, get the number off of the Transformer, Google it, buy one and replace the bad transformer. I was given one of these TV's and fixed it for $11. It's not rocket science, if you can use a DMM and a soldering Iron, you can fix this.