When i try to turn on my sony kv-27fs12 keep turn off and blink 4 time a red led make a pause and keep blinking 4 times, what that could be?

SOURCE: Sony FD Trinitron WEGA KV-36HS500 blinking red light 6 times

My Sony KV36HS500 Trinitron is doing the same thing. Last night the next street over was hit by lightning. The "7" blink pattern was happening, so like the manual stated, unplug it for 4 hours. Which I did. The t.v. is back up and running fine. It's a nice t.v., better than the plasma I paid over a grand for, that's already shot. It's a good t.v. and good that Sony put in the stand by protection to prevent the t.v. from dying an unnecessary young death. Patience, don't rush it, unplug the t.v. and leave it sit. Also, don't use a power strip, that was my mistake, and unplug your t.v. if storms are in the area, I was too lazy to and now I had to deal with this, in 8 years, only twice did this happen. I'd buy another one tomorrow if they still made them.

SOURCE: sony tv kv-36fs120 will not turn on

Use a hair dryer on the back right side of unit. Humidity sensor may be causing the unit to stay off. The hair dryer may also remove dust causing a false humidity detection

SOURCE: Sony KV-36XBR800 won't turn on and red led on the front blinks 6 times

Hello,
For 6 blinks Pls check following area.

Low HV Shutdown:
On the D Board.
Check IC8004/pin 7 should be 7.4v.
Check IC8006/pin 2 should be 2.5v if lower will trigger shutdown by causing pin 1 to turn on.
Check IC8006/pin 3 reference voltage 2.2v.
IC8006/pin 1 normally at 0v. If high
turns D5007 ON which turns the latch circuit Q6532,
Q6530, and Q6527 ON and turns the AC relay RY6501 OFF.

And NOTE: 6 blinks also can be Low B+ protection.

Unregulated 7.5 v from the power supply to 5v reg IC504 on the A Board. 5v to M Board Q2314

to CPU IC2300/pin 43. If 5v missing set will shutdown with 6 blinks.I think this will help you to solve this issue..

Dont forgety to Rate!!

Good Luck
Dals123

SOURCE: TV won't turn on, standby LED starts blinking

HI, this is the result of an unstable power sector in this unit. the fly back is malfunctioning and, you will need to replace it asap. i will list the part number below and a link to a site as well. you can purchase this part on-line if you wish.

FBT ASSY NX-4521//X4
Sony Part Number: 1-453-310-11

CLICK HERE TO ORDER

SOURCE: Sony FD Trinitron WEGA KV-32HS500...red standby light blinks 6 ti

I have over 10 years experience in electronic tech support.

I know this isn't what you want to hear, but the problem you've described can't be fixed with troubleshooting. Your TV will have to be repaired. There is a part that has developed a defect and needs to be replaced. If you're still in warranty, the TV will be repaired at no charge to you. The warranty would likely be at least one year from the date of purchase from the manufacturer. If you purchased an extended service plan they will repair the TV at no charge as well.

If the TV is no longer in warranty, it will likely cost a minimum of $150 parts and labor. This is assuming that you only need one circuit board or small part. If the problem is more than one of the circuit boards, the price of repair could go much higher.

I hope I've provided you useful assistance and that this information allows you to make an informed decision as to how to proceed from here. Please be sure to vote on my response. I hope I've earned a good rating from you today.

Please let me know if I can be of further assistance.