Hello and welcome to JustAnswer
These lights can mean different things when they blink.
Sometimes they blink continuously, and sometimes there is a pattern.
Can you check how many times each light blinks?
2 power & OPC then 3 OPC only then repeat
Yes, this is a common problem on these TV sets. The blink code indicates a fault with the main power board inside your TV.The issue is usually caused by faulty components or poor solder joints on the main power board inside the TV.
To repair the TV, you will need to order a replacement (new or used) main power board, and swap it into the TV (or get a TV technician to do this for you).
The Sharp part number for your board is RUNTKA397WJQZ and normally cost around $100. The best price I can find available is $77.51 - http://www.shopjimmy.com/sharp-runtka397wjqz-power-supply.htm
what is your experience with replacement boards having same bad components/poor solder joints on that board
This is indeed a problem, and it generally won't arise until after 2 or 3 years of use. Electronic components will all break down and stop working after a length of time, perhaps 5 or 10 years.What we have seen in many TV sets is the use of cheaper components by manufacturers which break down more quickly after less use.The poor solder joints have become more prevalent in the past few years as manufacturers have changed over to a lead-free solder, and this produces brittle solder joints which fracture and break more easily.
If you think getting a replacement board will lead to the same problems in a few years time, you could get your existing board repaired by a TV technician, who will fault-find the board and replace the faulty components with higher specification devices which will last longer.He will also visually check the solder joints for any signs of weakness and touch them up as necessary.
It might cost a bit more to have your existing board repaired rather than replace it, but it would work out to be more reliable in the long run if the work was carried out to a high standard as detailed above.
I replaced the Sharp RUNTKA397WJQZ board upon your recommendation. I have the same issue as before...Power and OPC flash twice then OPC 3 times then repeat
Optional Information: Make: Sharp Model: LC-C3234U Already Tried: I replaced the Sharp RUNTKA397WJQZ board upon your recommendation. I have the same issue as before...Power and OPC flash twice then OPC 3 times then repeat
There should be markings alongside certain pins on the 2 connectors (usually marked Vs or something similar). Connect the negative terminal of your multimeter to ground and the positive end to each one of these supply voltage terminals in turn to check that there is voltage present when the TV is turned on. If you can send me a clear photo of each connector I will mark it up if that helps.TAKE CARE - there are dangerous high voltages present inside the TV which can KILL!