Question about Sharp Televison & Video
I've suspected that the problem is in the tv itself not in the reception from the cable signal.
First your unit needs to check for possible causes of the symptoms as follows :
1. Loose connection - the unit must take apart and check the cable connectors from loose, all of the cables from the power supply board, main board, controller board must be pull-out, inspect and then re-insert and ensure that it is properly seat-in. Bad solder joints must be isolated in the said board also.
2. Faulty Electrolytic Capacitor - Leaky/dried filter electrolytic capacitor in the said board most especially in the power supply section will affect the performance of the board feeding to it. It will produced an out-of-regulation condition. Sometimes warm-up will cure the problem but the symtoms will get worst.
3. Main board - Faulty video circuitry in this board will do the same symptoms. If the fault came from this board, isolating the faulty parts is quite technical and needs an expert to solve the problem. Most likely, the whole main board is much better to replaced rather than to troubleshoot because almost same cost will be spend.
4. Controller board - Even the main board is good but this board is faulty, symptoms will appear also. This board is responsible for feeding the signal coming from the main board and feed to the LCD Panel.
If you don't have necessary tools and test instrument and can't troubleshoot the unit yourself, I would advice you to look for a professional TV technician to isolate where the fault came from. Service fee may cost $200-$300 depends upon the technician or the shop. You will charge also for the parts replacement which will cost $100-$200 depends on the boards gone bad. #1 and #2 fault will cost much cheaper than #3 and #4(parts replacement).
Hope I helped you.
Have a nice day!
Thanks for using Fixya.
Posted on May 28, 2011
If your picture comes and goes, then it is worth fixing. Won't have anything to do with cable rebooting. You would have to take the back off the TV. If you do place the TV face down on a table with the top of the tv fartherest away from you, and on a blanket to avoid scratching the screen. Take all the necessary screws out. When the cover is removed you will need to look at the top center there will be a bundle of wire that has a flat connector connected to a module or small board. The board is concealed under metal shield. Unconnect this and take a pencil eraser and gently clean the contacts that you can see with the pencil eraser. Plug back up the connection and be sure it is up all the way. Before putting the cover back on, it would be better to set the tv back up straight so you can see the screen and plug the tv up and turn it on to see if the vertical lines are gone. This is just testing to needlessly putting the cover back on. If they reappear then you would need to change the board that the connector you are cleaning goes to. If you need it just do a search on Ebay with your model number or go to www.shopjimmy.com and match up the number of the board with what is available. Also a google search with the model number will help locate one as well.
Posted on May 27, 2011
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Posted on Jan 02, 2017
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