Question about Panasonic PT-40LC12 40" Rear Projection HDTV

2 Answers

Green Light blinks no picture

How do I know that the bulb is bad by looking at it. Last time it blew
it actually made a loud popping sound and it was under warranty and
by replacing the bulb fixed the issue.
No popping sound this time and the wire on the bulb looks unbroken.
Is that all I look for in the bulb?

Posted by on

2 Answers

Re: Green Light blinks no picture - Panasonic PT-40LC12 40" Rear Projection HDTV Projection Televisions

What small blue lever?

Posted on Jul 01, 2008

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert whose answer got voted for 500 times.

  • Master
  • 4,402 Answers
Re: Green Light blinks no picture

Check that the thermistor/temp measuring device is suspect, no resistance across legs. There is a label there that says F701 see service manual
I went here for a tech manual for the Panasonic
then ordered
Manufacturer: Panasonic
Part Description: FUSE
Part Number: LSJA0411-1
it was mounted to the case that holds the lamp. had to remove the back panel, etc. Also think I had to splice in the fuse or something. was a while ago.

i purchased a NTE8115 from my electronics supplier, closest I could find.
Radio shack also has them.

remove the back cover and measure for continuity across the thermal fuse
above the lamp housing.
if open jump it wth a 5 amp fuse, be sure to close the safety switch with
the small blue lever then try to power on.
If comes on ok you will need to replace the entire ballast assembly to get
that fuse.
Panasonic does not have a part number for just the fuse on the PT40LC
It is possible to cut off the fuse and replace with another but dont solder

Posted on Jan 28, 2008

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

1 Answer

Loud pop

Check the lamp.
Pull it out and look at it.
More than likely the lamp has shattered inside the set and needs replaced.
Bulb replacement is made for consumers and can easily be replaced.
Need any more information, respond to this post and I will reply.

Dec 30, 2007 | Panasonic PT-45LC12 45" Rear Projection...

1 Answer

I have a 60" Sony

It seems lamp/ bulb popped again, check lamp inside tv.
If tv does not show red blinking light then it would be lamp that knocked off, replace lamp in tv to fix its problem, please buy Sony original lamp for good picture in tv.
Let me know if you have additional question.

Jan 15, 2011 | Sony Grand WEGA KDF-60WF655 60" Rear...

1 Answer

When trying to turn on my tv, the green light blinks a few times then the red light blinks a couple of times then automaticaly the tv shuts off. There is no picture at all. It makes a couple of sounds like...

sounds like the projection bulb went bad. change the bulb and it should work. sometimes they make a high pitch noise when they are trying to turn on. the bulbs seem to last about 2 years for me.

Jun 04, 2010 | Zenith E44W46LCD 44" Rear Projection...

1 Answer

Tv turns on w/pic then pic dissapears light blinks 4 times

I have the same issue, we've had to change our bulb three times in less than two years. now we have 61" expensive paper weight. Our current bulb is less than 6 months old. The TV is only 2 years old and like i said this is our third bulb.

the blue light blinks 4 times. you get sound. then a few minutes the the picture returns... then it goes out, and the cycle goes on.

A solution to this would be greatly appreciated.

Oct 08, 2009 | RCA HD61LPW165 61" Projection HDTV

2 Answers

Intermittant shut down with blinking green light on Sony TV 55"

Hi,Make sure you get the Original Philips lamps since they last 6000-8000 hrs 2-4 yrs,way better then Osram which last 4000-5000 hrs 1 - 1/2 yrs.

Oct 01, 2009 | Sony Grand WEGA KDF-55WF655 36" Rear...

1 Answer

Tv picture does not come on

my first question is have you checked the bulb. the loud pop sound like the bulb blew and the rattling sounds like the lamos trying to fire. remove the bulb cover and unscrew the bulb

Mar 18, 2009 | RCA Scenium M50WH187 50" HDTV

1 Answer

Pop then dark screen - no picture... New lamp installed and still no picture

Yes you are correct, I have seen this many times. 6 flashes is the thermal fuse

Mar 14, 2008 | Sony Grand WEGA KDF-55WF655 36" Rear...

3 Answers

No picture

The power supply or sweep power supply blew up, or the Horizontal/high voltage circuit went bad. If you have no tV repair experience, call in a pro to assist you in this repair. Good Luck

Mar 31, 2007 | Sony KP-51WS510 51" Rear Projection...

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

66 people viewed this question

Ask a Question

Usually answered in minutes!

Top Panasonic Projection Televisions Experts

Jaime Hernandez

Level 3 Expert

2267 Answers

Josh Whitehead
Josh Whitehead

Level 3 Expert

1142 Answers

The Knight
The Knight

Level 3 Expert

66518 Answers

Are you a Panasonic Projection Television Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides