20 Most Recent Panasonic PT-40LC12 40" Rear Projection HDTV Questions & Answers

If you paid a low price like $20 to $60 for the lamp it may not be an original replacement and may have failed.
But another thing it could be is to check the lamp cooling fan(s) where you might have to take some of the TV apart to do it.
If they have lots of caked on dust it would kill a lamp due
to inefficient cooling.

Panasonic... | Answered on Nov 12, 2017


Panasonic lamp timer reset procedure

1. Press the power button to turn the unit on.
2. There are 3 choices for this step, depending on the housing part number:

A. TY-LA1000, TY-LA1500 or TY-LA2005 While pressing the VOL- button on the projection display, hold down the PIP or SPLIT button on the remote control at the same time for more than 5 seconds.

B. TY-LA1001 or TY-LA2006 While pressing the VOL- button on the projection display, hold down the number 0 button on the remote control at the same time for more than 5 seconds.

C. TY-LA2004 While pressing the VOL- button on the projection display, hold down the MUTE button on the remote control at the same time for more than 5 seconds.

3A. When the reset procedure is complete the the following screen will appear: LAMP TIME WAS RESET TO 0 (this screen may be different from the actual screen)


3B. The POWER and LAMP LED's on the front of the unit will flash for 5 seconds. (TY-LA2006)

When the lamp time reset is finished, the LAMP indicator goes out. It may be necessary to attempt the procedure several times.

Panasonic... | Answered on Oct 29, 2017

yeah, should stay red when unit is turned off, indicating there's power but it's doing nothing.

Per user manual:
Solid red - power off (standby mode)
blinking red - power off (now cooling)
blinking green - power on (preparing to light lamp)
solid green - power on

Panasonic... | Answered on Jul 12, 2017

Page 58 of the user manual says that after cleaning the filter when the power is turned on, you will be given the opportunity to reply "Yes" to the question "Did you clean the filter". I suggest you go through the motions of cleaning the filter again, removing the necessary parts. Then replace the parts, turn the power on, and watch carefully for the message "Did you clean the filter".

Panasonic... | Answered on Aug 26, 2015

Your tv is not worth fixing im afraid.

Panasonic... | Answered on Mar 01, 2014

bad power supply or lamp is bad

Panasonic... | Answered on Nov 21, 2013

Try unplugging for 10 minutes.

Panasonic... | Answered on Oct 16, 2012

press and hold Volume Down on TV front and 0 (zero) button on Remote at same time for 5~6 seconds to reset lamp timer.

if you have questions or need help let me know, I am here to help


Panasonic... | Answered on Sep 01, 2012

About the only way you could have done that is by entering the Tech menu--that is why I will not offer that information for people here as it makes matters worse---get a Panasonic tech to undo the damage.

Panasonic... | Answered on Jun 17, 2012

Go to "Service Mode Map" by pressing the "Volume down" button key on the front panel and "TV/Video" button key on the remote control at the same time and hold it for more than 5 seconds. You can now reset/change the value of lamp operation time.


Panasonic... | Answered on Sep 21, 2011


See my tip at http://www.fixya.com/support/r8036688-lamp_reset_procedure_panasonic_tvs for the proper reset procedure.

Thanks for using FixYa and for the great rating.


Panasonic... | Answered on Jun 24, 2011

your lamp has gone out. replacement can be ordered online for about $175.
easy to install, plug and play.

Panasonic... | Answered on Apr 14, 2011

Hi sbr7352,
Best that you have to test the ballast board for faulty parts, the problem is, this need to checked with an experienced technician because lots of parts in that board involved like the driver transistor, resistors, capacitors and of course the ballast itself. Easiest way is to swap a new new bulb like what the shop do, they have an spare bulb to test the board if functioning because there is a sensor once didn't detect the bulb connected to the ballast board it will be disable by the processor. If you want to fix it yourself then you have to buy a new bulb or if you can find a spare one much better. Also, bad solder joints must be consider because it will do the same fault like what you've encountered right now.
Hope I helped you.
Have a nice day!
Thanks for using Fixya.

Panasonic... | Answered on Mar 09, 2011

Have you checked the thermal Fuse that is located right above Lamp? These sets had problems
with Thermal Fuse. Is all of the Fans working ? Lamp Fan?
Ballast board is what powers Lamp on. You need to also check 2 thermistors,they are known to be bad.
R2901 (180K-800K)
R2911 (40K-130K)

Panasonic... | Answered on Jan 13, 2011

Not finding what you are looking for?
Panasonic PT-40LC12 40" Rear Projection HDTV Logo

129 questions posted

Ask a Question

Usually answered in minutes!

Top Panasonic Televison & Video Experts


Level 3 Expert

5700 Answers

The Knight
The Knight

Level 3 Expert

76455 Answers

Muntejaya Ginting
Muntejaya Ginting

Level 3 Expert

10422 Answers

Are you a Panasonic Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

View Most Popular

Panasonic Televison & Video

  • Panasonic Televison & Video

Most Popular Question


  • Televison & Video