KDFE50a10...originally had 4 flashing red lights>replaced lamp cooling fan. After re-assembly, had 3 flashing red lights>replaced lamp door sensor. Still have 3 flashing red lights. Any thoughts? If it's the lamp, is there a way to test it; as it was working just fine prior to any of these problems?

Hi,
Did you buy the original lamp?
If the problem is related to the lamp door switch, you will get a different error instead of lamp LED.

Do you hear the color wheel spinning?
Again, if it's a color wheel problem the error will be different!
My good guess is the lamp but, it could be the ballast or both.

Best of luck

www.aaatvservice.com

I have the same TV and had same problem . Try taking the bulb and assembly out and reinstall , there are some sensors on the assemblies that might not be getting good contact . It fixed mine .

hello. it sound's like you need to replace the lamp in your set. and here is how to do it the right way. rember to all ways unplug your set.. # 1 first. .Remove the outside lamp cover. The lamp cover is located on the right side of the Sony television. To remove the lamp cover, simply pull down. You will now have access to the lamp housing. # 2 Open the lamp housing door by turning the locking handle counterclockwise while pulling the door toward you # 3 Pull the lamp unit straight out of the television unit. Be sure not to touch the bulb, as it may still be hot. # 4 Slide the replacement bulb into the lamp housing. # 5 The lamp will slide securely into place.!!! "Do not" touch the new bulb as it will cause damage to the bulb and result in malfunction. # 6 Push the lamp door back into place. Turn the locking knob clockwise to secure the door in place.# 7 Slide the outside lamp housing cover back into place on the television.!!! plug your set back in to the wall & The television is now ready for use. thank you

This could be a sign of the color wheel failing. This is part of the light engine assembly and is not sold separately as far as I know. My most common source lists the light engine as out of stock. (The last quote I had was ~$600 for the assembly.)

The cooling fans can also cause a noise as they fail. However, the red light would be blinking in that case.

I hope this helps.

Cindy Wells

Try connecting the TV directly to a different wall outlet and check. If the issue persists, try power resetting the TV. Turn Off the TV and remove the power plug from the wall outlet for 1 minute and reconnect it and check the operation. If the issue persists, then the TV requires service.

Error Indication Information
Error No. Error Information ERROR DESCRIPTION LAMP LED OSD LAMP OFF
(Note 3) (Note 4)
POWER LED TEMP LED
Note:
1.When any of the above errors has occurred, the LED will flash as shown above every 5 seconds.
2.When two or more errors have occurred at the same time, the LED will light up or flash as shown above, and then
change to another every 5 seconds in turn.
3.Warning OSD appears when the Air Filter is clogged 90%, accumulated operation time of the Lamp reaches 5000 hours,
or accumulated operation time of the Air Filter reaches 400 hours.
4.LAMP OFF: The LED will flash right after the Lamp goes off.
5.IC2301 is mounted on LCD Main C.B.A. which is included in the Projection Unit.
6.IC6001 is mounted on TV Main C.B.A.
Clogged air filter
more than 90%
15)
16)
17)
18)
1)
2)
3)
4)
5)
6)
7)
11)
8)
9)
10)
12)
13)
14)
- flashes 5 times -
every 5 seconds
IC2301(pin82) detects the clogged air filter, then indicates the
error when the air filter is clogged 90%.
Front Fan stop or
Lamp Fan stop
flashes orange
once every
5 seconds
- -
IC2301(pin12) detects the Front FAN stop or Lamp
FAN stop, then indicates the error when the Front FAN
or Lamp FAN is stopped.
Lamp Cover open
Temperature Sensor
short or open
flashes orange
twice every
5 seconds
flashes orange
3 times every
5 seconds
flashes green for
140 seconds.
flashing red for
60 seconds.
light up red.
flashes once
every 5 seconds
flashes once
every 5 seconds
flashes red for
10 minutes
flashes once
every 5 seconds
-
-
-
-
Abnormal
Temperature
flashes twice
every 5 seconds
flashes twice
every 5 seconds
- -
Request for Lamp
Replacement - - lights up
Power Ballast Error
(abnormal
Lamp voltage)
- -
flashes 3 times
every 5 seconds
Power Ballast Error
(abnormal
temperature)
- -
flashes 4 times
every 5 seconds
Power Ballast Error
(other causes) - -
- -
Request for Filter
Cleaning -
Abnormal Voltage
on 16 V line of
LCD Main C.B.A.
-
flashes twice
every 5 seconds
flashes twice
every 5 seconds
Abnormal Voltage
on 14 V line of
LCD Main C.B.A.
-
flashes 3 times
every 5 seconds
flashes 3 times
every 5 seconds
Abnormal Voltage
on 7 V line of
LCD Main C.B.A.
-
flashes 4 times
every 5 seconds
flashes 4 times
every 5 seconds
IC2301(pin76) detects the Lamp Cover Unit condition
(open or close), then indicates the error when the
Lamp Cover Unit is open.
IC6001(pin85) detects the Duct FAN stop, then
indicates the error when the Duct FAN is stopped.
IC2301(pin74 and 75) detects open or short of the Temperature
Sensor (R2911) on Front Thermistor C.B.A., then indicates the
error when Temperature Sensor is open or shorted.
(The error is not detected for 1 minute after Lamp ON.)
IC2301(pin74 and 75) detects the temperature attached near
the Front FAN by the Temperature Sensor (R2911) on Front
Thermistor C.B.A., then indicates the error when the
temperature becomes more than 43 C (109 F).
(The error is not detected for 1 minute after Lamp ON.)
IC6001(pin86 and 87) detects open or short of the
Temperature Sensor (R2901) on Lamp Thermistor C.B.A.,
then indicates the error when Temperature Sensor is open or
shorted.
(The error is not detected for 4 minutes after Lamp ON.)
IC2301(pin74 and 75) detects the temperature attached near
the Lamp by the Temperature Sensor (R2901) on Lamp
Thermistor C.B.A., then indicates the error when the
temperature becomes more than 60 C (140 F).
(The error is not detected for 4 minutes after Lamp ON.)
IC2301(pin11) detects the error of LCD Power C.B.A.,
then indicates the error when the temperature fuse
(117 C)(243 F) in LCD Power C.B.A. is open.
IC2301(pin11) detects the error of LCD Power C.B.A. and Lamp,
then indicates the error when an inner malfunction of LCD Power
C.B.A. occurs, the Lamp voltage becomes more than 130V or
less than 30V, Lamp current becomes more than 5A, or the Lamp
is cracked.
IC2301(pin11) detects the error of the Lamp, then indicates the
error when the Lamp is short-circuit.
IC2301(pin48) detects +16V line voltage on LCD Main
C.B.A., then indicates the error when the voltage
becomes less than +13V.
IC2301(pin47) detects +14V line voltage on LCD Main
C.B.A., then indicates the error when the voltage
becomes less than +11V.
IC2301(pin45) detects +7V line voltage on LCD Main
C.B.A., then indicates the error when the voltage
becomes less than +5.7V.
IC2301(pin44) detects +3.3V line voltage on LCD Main
C.B.A., then indicates the error when the voltage
becomes less than +2.5V.
flashes 3 times
every 5 seconds
flashes 4 times
every 5 seconds
Abnormal Voltage
on 3.3 V line of
LCD Main C.B.A.
-
-
-
- flashes 5 times
every 5 seconds
Forced cooling
The failure of Lamp
light up
-
Temperature Sensor
short or open
-
-
Abnormal
Temperature
Duct Fan stop -
When accumulated operation time of the the Lamp reaches
5000 hours, OSD (replacing the Lamp) appears on the screen.
Note: The Lamp time is stored in EEPROM (IC2305).
When accumulated operation time of the Air Filter reaches 400
hours, OSD (cleaning the Air Filter) appears on the screen.
Note: The Filter time is stored in EEPROM (IC2305).
During forced cooling, this indication is indicated.
IC2301 (pin11) detects the failure of light up processing of
the Lamp, then the POWER LED is changed as follows.
1) POWER LED flashes green for 140 seconds (while turning on).
2) POWER LED flashes red for 60 seconds (while cooling).
3) POWER LED lights up red (standby).
Note: If the Lamp will not light after attempting turning on the
power 2 or 3 times, the Lamp, the LCD Power C.B.A. or the
LCD Main C.B.A. may be defective.
Error Symptom Problem Possible Solutio

Hi,
Yes, its clear symptoms of weak lamp that is going to end of its working life, soon tv will show you lamp light.
Replace lamp to solve the issue, lamp replacement procedure is easy and written in user manual.
Please buy Sony original lamp for good picture in tv.
Thanks.

6 times red light blink shows error in power supply (GT) board because of no 12 volts output for some reason.
Replace GT board to fix the problem.
Let me know if you need GT board part number info.
Thanks.

Check the fan that cools the bulb. It is directly behing the bulb. It should turn on when the power comes on. It apparently has a safety to protect your tv(and home). mine is in the process of going out. looking for online solutions as we speak.

I have the same problem my DLP TV would shut off after 30 minutes or less all red LED's. Solution: The fan on the lamp assembly was not turning at the proper RPM (bearing going bad) so it was going into overtemp mode. The original part number was a SUNON KDE1209ptv3 12v 1.3W I had a hard time finding one to match that spec. DIGI-KeyCorp (www.digikey.com) was able to cross reference it to a 3 lead P11034-ND part number (NMB-MAT model fba09a12L).

I Installed the fan and problem went away.
Procedure:
Remove the lamp from the lamp assembly
Remove the back panel.
From the back, slide the main circuit board to the left (loose one screw)
Remove the power interlock on the lamp assembly (2 screws)
Disconnect Lamp assembly cooling fan lead.
Remove the 4 silver slotted screws on the lamp assembly, 2 in the front and 2 in the back.
Carefully remove the lamp assembly from the rear. WATCH the Mirror.
Remove fan, cut leads and solder or **** splice on to the new fan.
Repeat steps for installation