Purplish/blue spot on screen

Make sure the projector lenses are clean and also the interior of the screen.

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need to replace light engine to resolve this issue

Unfortunately your light engine(also know as optic block) may need to be replaced. If your tv is out of warranty, it will probably cost around $1000 to fix. There is a slim possibility that the optics lens could have dust on it and a tech could clean it for much less than that. This is a very common problem in any dlp tv and they are all expensive to fix. I've replaced several of them at our shop, but about half of the customers won't have the tv fixed and will get a new one. Good luck!

You need to contact a serviceman. Your light engine needs replaced. Panasonic requires prior tech authorization for parts order fulfillment such as this. PN: TZSC03045 It will be costly, roughly $800 with $250 core charge. Labor and trip fees are another thing altogether. I hope this helps.

Howdy,
The problem is with the EEPROM in the TV that needs to be reprogrammed. But you need to have the proper Correction Tool (LSUQ0100).
I don't think it's available to the public. Call a Service Company, but make sure they have the “Correction Tool”.

Thanks for using FIXYA, big IRISH.

The problem is the computer in the TV is set to hold data for 2500 "On/Offs" Once you turn the TV on and off 2500 times, the dots start to appear as the computer cannot store anymore date. Call Panasonic, they will send a tech to your house for free and reset the computer and update it at the same time from 2500 to 1 million on/offs so it wont happen again. It takes maybe 10 mins to complete.

Hope this helps.

coloue spots on screen. how do you fix with screwdriver?

Just have Panasonic tech do "eprom upgrade".

Having similar issue with my PT-44LCX65. Lamp blew and replaced it (last month), never figured out how to reset timer. Now red indicator light blinks once every 5 seconds and after about 4 minutes TV goes black.... Any ideas?

I also have this problem. TV is 2 years old. Service tech says the repair will cost about $600 per spot. I have 4 spots