I replaced the fan on my 55" Sony Projection TV , after it was blinking a red light 4 times and woukd not come on. Isnt it suppose to come on when you turn the tv on to keep the blub cool?

SOURCE: 55 in Sony KDF55WF655 Goes to standby and red light blinks 4 times

Check the thermal sensor fuse part# 1-910-023-93 or possibly one of the four fans. If the unit goes into Fan/Thermal Protect shutdown (4 blinks) it can be difficult to determine the cause since the unit turns off too quickly to troubleshoot. Solution: Ground the data line by inserting a jumper between pins 3 and 6 of CN44 on the H4 board. This overrides the protection circuits for troubleshooting. Do this right after turning the unit on and as soon as the lamp is seen lighting. Check pins 2, 5, 8, and 11 of CN6000 on the G2 board for less than 1VDC. Any voltage higher than that indicates a faulty fan. If all voltages are within specs, the H4 board must be replaced. If a fan is found defective, the optical block will need to be replaced if it is located inside the assembly. H4 Board Part Number: A1054674A Replace the following part based on which pin of CN6000 is out of specs: Pin 2: Fan 1 (part of optical block) Pin 5: Fan 2 178723211 Pin 8: Fan 3 178706511 Pin 11: Fan 4 178708111 Optical block Part Number: A1084662A

SOURCE: Sony KDS-60A2000 projection TV: power led blinks 4 times

the projector bulb has gone out you need to replace it.

hope this helped
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SOURCE: TV Wont turn on - Red Blinking Light under Lamp

The lamp is shot. Port is on the right side of set - just remove and take a look. Check VISA limit.

SOURCE: KDS-R60XBR2 power led blinks 4 times,

There are three fans the one that usually fails is located on top of the optical block and cannot be reached by the owner unless you take the set apart yourself. What is happening is that one of the fans are not spinning fast enough or has stopped altogether. The best solution is to replace all three fans cleaning may not be enough to get a slow fan up to speed, and the tech should blow out the dust in the duct work. This is what the tech coming out will (or should) be doing. Also some fans will have an intermittent startup, and cause this intermittently, so it is a good idea just to replace the fans instead of just cleaning them.

Jango Fixit

• 38 Answers
• Posted on Jan 09, 2014

SOURCE: kdl55ex710 sony tv red light 7 times blinking

Sony Bravia 7 blinks disclosure
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