Sony tv KV34XBR800, DA-4 chasis: Can hear tv power up, led blinks 6x. TV had some problems previously starting up but once it came on it played perfectly/been leaving tv on/ got shut off accidentally---no longer comes back on. Replaced IC 6501 and IC 8002 and c6503 and c6590 and it still doesn't come on. What else can I check

hi if your tv is KLV-40V300A with 6x blink then the inverter board is defective replace the inverter board & tv will become ok

1. Turn on the device (for example, DVD player) and, if needed, load media (for example, DVD).
2. On the remote, press a device key (that is, VCR/DVD, CBL/SAT, or TV). 3. Press and hold P until the red LED blinks twice, then release.4. Enter the first four-digit code for your device.
The LED blinks once as each digit is entered. If the code is correct, the LED blinks twice.
NOTE: If the LED does not blink twice, repeat steps 2 to 4 and try entering the code again.
5. Aim the remote at the device and press Power (or Play, if it does not have a Power key). The device should turn off. If it does not, repeat steps 2 to 5, trying each code for your brand until you find one that works.6. Repeat steps 1 to 5 for each device you want to control. For future reference, write down each working device code in a safe place.Code search Method

1. Press TV once.
2. Press and hold P until the red LED blinks twice, then release.
3. Enter 9 9 1. The LED blinks twice.
4. Aim the remote at the TV and press Power. The remote sends IR codes from its library to the selected device, starting with the most popular code first.
5. If the TV responds, go to step 6. If the TV does not respond, press CH+. The remote will try the next code. Continue until the TV responds.
NOTE: Press CH- to try the previous code.
6. To lock in the code, press P once. The LED blinks twice.
7. To search for other device codes, repeat steps 1 to 6, substituting the appropriate key for the device.

May I get the model # to help you more

Actually there is no code specified in URC-3021 manual to work with Signature.
But still we can try

If your device does not respond to the remote control after trying all codes
listed for your brand, or if your brand is not listed at all, try searching for
your code.
NOTE: Before performing a code search for a DVD player or a VCR, turn on the device and
insert the required media.
For example, to search for a code for your TV:
1. On the remote control, press TV once.
2. Press and hold SET until the LED (red light) blinks twice,
then release SET.
3. Enter 9 - 9 - 1.The LED will blink twice.
4. Aim the remote control at the TV and slowly alternate
between pressing POWER and TV. Stop when the TV turns off
(after pressing POWER). If the device does not have a Power
key, you can substitute another function, such as digits 0 ~ 9 ,
CH up, or PLAY).
NOTE: In the search mode, the remote control will send IR codes from
its library to the selected device, starting with the most popular code
first.
5. To lock in the code, press and release SET.The LED will
blink twice.
6. To search for the codes of your other devices, repeat steps
1 through 5, but substitute the appropriate device key for
the device you are searching for.

If you have set up the remote control using the Searching For Your Code procedure
as above, you may need to find out which four-digit code is operating
your equipment. For example, to find out which code is operating your
TV:
1. On the remote control, press TV once.
2. Press and hold SET until the LED (red light) blinks twice,
then release SET.
3. Enter 9 - 9 - 0.The LED will blink twice.
4. To view the code for the first digit, press 1 once.Wait 3
seconds, count the LED blinks (e.g., three blinks = 3) and
write down the number in the leftmost box in the TV
code boxes on page 8.
NOTE: If a code digit is "0", the LED will not blink.
5. Repeat step 4 (on the previous page) three more times for
remaining digits.Use 2 for the second digit, 3 for the third
digit, and 4 for the fourth digit.Write down the code digits
in the remaining TV code boxes on page 8.
6. To check for codes of other devices, repeat steps 1
through 5

I HV A PROBLEM WITH SONY-KV-HA21M80 TV. WHEN THE SWITCH ON POWER ON AND GETTING OFF. FRONT LED IS BLINKING 4 TIMES. WHAT COULD BE THE PROBLEM. PLS HELP ME ON THIS.

The red light should be blinking a code. For example it will blink 4 times pause then 4 times pause or 5times pause 5 times pause, whatever the error might be. Let me know what it is and then we can help more.

Tim
[email protected]

SEARCHING FOR YOUR CODE
If your device does not respond to the remote control after trying all codes
listed for your brand, or if your brand is not listed at all, try searching for
your code.
NOTE: Before performing a code search for a DVD player or a VCR, turn on the device and
insert the required media.
For example, to search for a code for your TV:
1. On the remote control, press TV once.
2. Press and hold SET until the LED (red light) blinks twice,
then release SET.
3. Enter 9 - 9 - 1.The LED will blink twice.
4. Aim the remote control at the TV and slowly alternate
between pressing POWER and TV. Stop when the TV turns off
(after pressing POWER). If the device does not have a Power
key, you can substitute another function, such as digits 0 ~ 9 ,
CH+, or PLAY).
NOTE: In the search mode, the remote control will send IR codes from
its library to the selected device, starting with the most popular code
first.
5. To lock in the code, press and release SET.The LED will
blink twice.
6. To search for the codes of your other devices, repeat steps
1 through 5, but substitute the appropriate device key for
the device you are searching for.
CHECKING THE CODES
If you have set up the remote control using the Searching For Your Code procedure
as above, you may need to find out which four-digit code is operating
your equipment. For example, to find out which code is operating your
TV:
1. On the remote control, press TV once.
2. Press and hold SET until the LED (red light) blinks twice,
then release SET.
3. Enter 9 - 9 - 0.The LED will blink twice.
4. To view the code for the first digit, press 1 once.Wait 3
seconds, count the LED blinks (e.g., three blinks = 3) and
write down the number in the leftmost box in the TV
code boxes on page 8.
NOTE: If a code digit is “0”, the LED will not blink.
5. Repeat step 4 (on the previous page) three more times for
remaining digits.Use 2 for the second digit, 3 for the third
digit, and 4 for the fourth digit.Write down the code digits
in the remaining TV code boxes on page 8.
6. To check for codes of other devices, repeat steps 1
through 5 (starting on the previous page), but substitute
the appropriate device key for each device you are checking.
Write down the device’s code digits in the appropriate
code boxes on page 8.
I could not find the codes but you can follow these instruction to program without codes

most like it you have a problem with the power suply common problem is flyback

it is a bad fan. it also could be a power supply. Quite often the real problem is dirt clogging up the fan(s) to the point that they need to be replaced. Operation of the set in a dirty environment is not a good idea