Powerlight blinks 8 times on Panasonic PT-50DL-54

The powerlight blinks red 8 times after lamp goes out. Does that 8 times mean anything? I do not have a service manual, can anyone help?
I disconnect the TV from the outlet wait a while and replug it and switch it on and it's OK for an undetermine period, can be 2 hrs, 2 days, weeks or months.
It sometimes also shuts down and blinks green like for the normal cooling period and restarts by itself.
It's the 3rd lamp and it has about 3000 hrs but it's been doing this since it had 30 or so days, less frequent then as I recall but not much.
By the way, this one is a phillips for what it's worth.
Please respond
P.S. As for the original lamp, apparently they are not available any more, my brother inlaw just tried tobuy one a couple of weeks ago and was told by the dealer "no stock anywhere". He had to get an after market one purchased by the dealer. I coud not get the make.
Thanks
Powerlight blinks 8 times on Panasonic PT-50DL-54

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