HOW TO RESET KDL40W4500 - Sony BRAVIA KDL-52W4100 52 in. LCD HDTV

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hi,
T-Con board failure or poor connection of flexible wire and LVDS cable. Sometimes these connection loosen up from their terminals. Try to unplug and reconnect these cables to refresh the connections. If the symptoms still persist you need to replace the T-Con board. T-Con board is installed on the upper side of your LCD TV and it has two flexible wire connected to LCD PANEL .

are these lines vetical or horz if they are vertical your panel has failed and will need to be replaced big bucks if they are horz , then it could just be the T-con board and you will need a tech to confirm this I have seen this problem cause by a poorly seated connection

The P300 has 3 kinds of reset mechanisms, 1. Soft Reset: you can keep all DRAM data. Procedure: Push the Reset button 2. Hard Reset/Save SDRAM -- Use hard reset/save SDRAM mode to reset the MobilePro P300 without losing the data in SDRAM. Use this mode if the safe software reset mode doesn't improve system operation. Procedure: Reset Button and Power Buttons at the same time. 3. Hard Reset/ Clear SDRAM: You will lose all data. Use to reset the MobilePro P300 and delete the contents of SDRAM. Use this mode to reset the MobilePro P300 to its factory defaults. This is also referred to as a hard reset/clear SDRAM. **Caution** This procedure will delete all user installed applications and user data. If necessary, back up your data before performing the hard reset. Procedure: Push the Reset, Power, and Record Buttons at the same time