Television power led blinking

An unstable output from the main power regulator board. 3-blinks of standby light denotes it. You've to troubleshoot the main power supply regulator board, all of its output voltages. If you wish to get some details, check this link. http://electronicshelponline.blogspot.com/ Selecting the view option, either to Mosaic / Timeslide / Flipcard, can be selected by the drop-down list, at the top left of the display window, will make surf easy. You can also do a search, by type in the brand name / model number / IC used, in the search box at the top right of the display window.

Seven blinks = High voltage shutdown (overcurrent protection). The high voltage has exceeded 33k and the unit goes immediately into safety shutdown. Check power supply regulation and horizontal circuits, otherwise send the TV to a workshop for a quote on likely parts and labour costs, then make a decision afterwards about whether it is economical to repair or not.

Usually it is either the flyback transformer, the tuning capacitors in the collector circuit of the horizontal output transistor(s) as well as the transistor(s) which could be faulty. These parts should be replaced at the same time.

Short-circuit horizontal output stage - hence the 7 blinks error code from the standby LED.

Hi tileman5,
Your 7 blinks (error code) means that your 8.6 vdc in the power supply section is faulty.This was sense by the standy-by power supply's initial test. This voltage is easy to locate in the power supply board, each output voltage is written in the board itself. Concentrate in its regulator circuitry. Look for open fusible resistor, shorted transistor and leaky/dried capacitor. The unit is disable unless you fix this 8.6vdc fault.
Hope I helped you.
Have a nice day!
Thanks for using Fixya.

• Seven blinks - High voltage shutdown. The high voltage has exceeded 33k and the unit goes immediately into safety shutdown. Check power supply regulation and horizontal circuits.
  

Hope that helps.

Hello
Your TVs horizontal output stage is not working. That means, the line output side [LOT and related components], are inoperative. It may be due to some secondary missing voltages from the power supply section of your TV. There may be some open resistor, or short inside the Line Output Transformer [LOT] itself. Anyway that side is not working. Your TVs power supply regulator system has no trouble. It supplies the required voltage to the other sections. That is why you see the LED [Light Emitting Diode], fitted in front panel of your tv blinking for some time and shuts off. As soon as the TV is switched on, the power regulator system inside the tv will supply all the necessary secondary voltages to all sides. If at any section misses the required voltage, the system control Ic will detect it, and will try to rectify that. It is so programmed at the factory. If it can't do it, it will automatically shuts all the supplies from the power regulator system. It is a protection added by sony to all models of their Tvs.
You yourself cannot detect and repair this fault. Get the service of an experienced technician.

The Inverter is trying to produce the high voltage to light the backlight. It looks like it cannot hold the charge to maintain the high voltage level in order for it to stay on - you get a momentary display at initial power-up thus see the logo. Replace the Inverter board.

This is a issue with the power supply board here is a link that shows you what this blinking light codes mean
Seven blinks - High voltage shutdown. The high voltage has exceeded 33k and the unit goes immediately into safety shutdown. Check power supply regulation and horizontal circuits.

http://www.techlore.com/article/15444/Understanding-Sony-Television-Blinking-Codes/

here is a complete list of all codes for panasonic tv's rgeardless of model if its panasonic it is these codes

1 Blink SOS: This shutdown operation is usually caused by a lack of communication between the A and the D boards.
1 Blink SOS: This shutdown operation may be caused by the improper connection of a SS board connector to the panel.
2 Blinks SOS: Pin 87 of the MPU IC9003 monitors the 15V line. During normal operation, the transistors Q9053 and Q9054 output a high to pin 87. If the 15V line is missing or shorted, a low is provided to pin 87. As a result, the unit shuts down and the power LED blinks 2 times.
3 Blinks SOS: IC9807 is a 3.3V regulator located on the D board. Its output is monitored by IC9003. If the 3.3V is not present at pin 86, the MPU shuts down the unit. The power LED blinks 3 times.
5 Blinks SOS: Pin 85 of the MPU IC9003 monitors the 5V line. During normal operation, the transistors Q9051 and Q9052 output a high to pin 85. If the 5V line is missing or shorted, a low is provided to pin 85. As a result, the unit shuts down and the power LED blinks 5 times.
6 Blinks SOS: Pin 90 of the MPU IC9003 monitors the status of the SC board. During normal operation, the transistor Q6581 and IC6581 output a low to pin 90. If the SC board becomes defective, a high is provided to pin 90. As a result, the unit shuts down and the power LED blinks 6
6 Blinks SOS: 6 blinks of the power LED may also be obtained from pin 3 of IC9003, the DRV_RESET input. The D board provides the 5V source needed to power the C boards. On the C2 board, the 5V is routed back to the D board via connector C20/C10, C11/D31 causing pin 3 of IC9003 to be high. If 5V is not routed back to the D board, pin 3 of IC9003 goes low. The set goes into shutdown mode and the power LED emits 6 blinks.
7 Blinks SOS: Pin 93 of the MPU IC9003 monitors the status of the SC, SU, SD board. During normal operation, the photo-coupler PC6480 outputs a low to pin 93. If the SC, SU, or SD board becomes defective, a high is provided to pin 93. As a result, the unit shuts down and the power LED blinks 7 times.
8 Blinks SOS: Pin 91 of the MPU IC9003 monitors the status of the SS board. During normal operation, pin 8 of connector SS23 outputs a low to pin 91. If the SS board becomes defective, a high is provided to pin 91. As a result, the unit shuts down and the power LED blinks 8 times.
10 Blinks SOS: The SUB5V and DT9V sources created on the A board are monitored by IC1100. If they are not present at pin 30 and 34, the MPU shuts down the unit. The power LED blinks 10 times.
10 Blinks SOS: The F_STB_15V of the P board, as well as the derived SUB5V and DT9V sources are monitored on the A board for excessive current. If a short circuit is developed in one of the supplied lines, pin 114 of IC1100 receives a high. The SUB5V and DT9V lines are also monitored for excessive voltage. When an over-voltage condition is detected, a high is also output to pin 114 of IC1100. The DT9V is provided to a DC/DC converter to create the BT30V for the tuner. If the BT30V becomes excessive, a high is output to pin 114 of IC1100. A high at pin 114 of IC1100 causes the unit to shutdown and the power LED to blink 10 times.

RED light is protect circuit = do not disable !
Look for C702 near flyback transformer - might be hidden in
glue = check it = if shorted, replace 102K / 2KV with 3KV =
Sony part # 1-161-754-00 and replace E994 pico fuse.....T.

try Check first all the output voltage in the secondary of the chopper transformer if regular voltage acquire. check secondary switching circuit feedback towards the opto isolator and syscon.
Assuming that HOT is OK.