A short circuit in a light switch put a power surge on my Sharp LCD. Screen is blank now with power and OPC pilot lights flashing 2 blink every 2 seconds. Looks like the TV wants a reset of some type.

Hi George.


The Two blinks it is not an error code, but it is just indicating that the TV is on protect mode, in consequence of power surge.
This may have happened either because the main board detected wrong voltage and sent PSU to protection (Only +5V active on PSU to keep led blinking), or because the power surge and power back had overloaded one component and blown it.

Power surge faults can concern PSU, main controller board, and inverter.
PSU damage is most common, after protection and no faults state.

To verify if this is a false alarm, the reset is done leaving the set unplugged from AC main for one hour or so (often ten minutes is enough).

This will drain power completely, allowing capacitor complete discharge, and will reset the protection mode.
This is the only reset used to get out of protect mode.

If that does not work, then there is a fault.

The factory default settings reset accessible from service mode (often using TV/Video and Menu buttons at same time) will not be available while TV is on protect.

One of the parts most commonly concerned is the PSU.
This operates at different voltages.
There is a +5V line that is on even on protection, and 8 V, 9V, 12V and 35V lines that get started by main controller board using low voltages control lines connected to PSU.
An expert repairer can spot the control lines working on the part. The control lines are jumped with a +5V or +3.3V hot solder joint to activate higher voltage on respective lines.
In this way the tech can test higher voltages while the PSU is on only +5V in protect mode.
This full test is suitable for an experienced TV repairer. Jumping contacts on PSU printed circuits there is a lot of risk to short and cause more damage.

A general test on PSU can be done with optical check , looking for bulged or leaky capacitors, and reading impedance on resistors placed near to the different power outputs (if they have no continuity , then they had blown). This test must be done with power not connected.

Another way to test PSU is by using troubleshooting diagrams on service manual.
This is a different approach. The manual will instruct the technician to test a series of diagnostic and safety components that will blow when a determined problem occurred.
Below service manuals for similar models:

SERVICE MANUAL

LC-27R25 LC-32R26

SERVICE MANUAL


Service manual for your model is not easily available for download or purchase from third party. You can try inquiring at the seller below, or ask Sharp.
Sharp usually refuse service manual distribution to non authorized sharp technicians, and third parties do not have this model.
When we do not get service manual we do the repair without it.
The only reseller I found is this website, you will get an online download for few dollars:Sharp - LCC5255U Service Manual

Here the Seller with part list for your TV.

Regarding remaining faults, the main controller board is more difficult to test. This is tested along with PSU.
After activating voltages on PSU you check response on main controller circuits.
For example you turn on the +35V on PSU, that is going to supply power to the inverter.
You test volts at PSU and inverter DC output on main board.
If PSU has +35V, but inverter contact has no volts, then main board is faulty.

Last part to test is the inverter. This part is getting DC volts from main board and it is supplying AC high voltage to backlight system.
Depending on the model, voltage out can get over 1KVolt.
This is tested reading Ohms on fuse/resistor usually located on inverter input, reading DC input from controller, reading high voltage out. A full test on the inverter is done using an oscilloscope to read oscillators on final section of the circuit.

All tests must be done by a technician.

Try first leaving the TV unplugged for some time, see if this can reset protection state.

If it does not check PSU summarily, testing resistors for continuity and checking if you spot blown capacitors at a glance.
If still no luck the TV must be tested thoroughly, as on description above.

Please do not forget to leave feedback.

Many thanks.

Hello. Thanks for choosing fixya! Here is the link to the repair manuals for all sharp tvs. Select your model and download the manual. Then go to the blink code page and it will tell you what the 2 blinks means. http://www.sharp.ca/manuals/default2.asp

Unfortunately, unless you had your tv plugged into a surge protector, you may have fried one or more components. unless you have all of the necessary test equipment, I would recommend having a trained technician fix it for you this time. Then purchase a good surge protector, well worth it to protect your investment. Best regards, J.

Sorry to hear that you are having problems with your Sharp TV.

Unfortunately, there is no "reset" of some type on this kind of TVs. This issue is caused by an error in the power supply. Perhaps a semiconductor was damaged. You may want to unplug the TV for a while, (Let's say 5 to 30 minutes) and plug it back. It may work after that, but definitely the TV needs service.

Replacing the power supply is the right solution. Check the warranty information, perhaps the manufacturer can assist you.

Good luck!