Just paid to replace the lamp 2 weeks ago in our mitsubishi 73 dlp 1080p tv purchased a 5 year in home contract with Tweeter Sevice net 1/2008 lamp fixed and picture is once again great but now the 73 ' screen is getting little white dots up to 5 what is this and who do we contact

Yes. It appears that your lamp is nearing the end of its life. You will need to replace it. Here is the part number. I hope this helps.

Try checking for a blown fuse where the power cord enters the TV. Please unplug first.

Contact the authorized service center for Mitssubishi. It can't be purchased from open electronic spare part market.
Electro help

If it's older. Probably a blown lamp. Check owners manual then shop,new one on eBay. Easy to replace. I have done it twice

I developed white spots on the screen of my Mitsubishi WD-57734 in increasing numbers over days and weeks. I called a repair service who quoted me $1500 to replace the light engine. He suggested I call Mitsubishi Customer relations at 800-332-2119 option 5 which i did. To make a long story short after several conversations with them they agreed to replace the part for free if I picked up the labor (Would have been less conversations if I had the original purchase receipt). Instead of $1500 I paid $250. The tv was only 3.5 years old. Perseverance paid off.

Yes,the tv projection lamp life are ending.Replacing the tv projection lamp will solved this problems.

It will cost you probably in the area of $700.00 to replace the Light Engine. I don't think it would be a good idea to repair it. DLP sets have been out of production a few years now due to high failure rates of the light engines for all makes and models and the consumer cost for the lamp.

I have a 57" DLP and have replaced the bulb 3 times in 2&1/2 years. I'm not possitive but I think I have 6-800 hrs on it total. Mitsubishi claims it a part they expect to go out, but the told me they typically last about ten yrs. If you have proof of purchase they will send you a new one for free, otherwise it'll cost you about $150 on ebay.

This would be the little sensor on the light wheel. Its cheap, you can get them online for around $2. You will need to take the light engine out and remove the color wheel cover and remove the color wheel and then remove the sensor. You will have to desolder the sensor and remove it to replace with the new one.
What is happening is the sensor is overheating and not tracking the color wheel properly there for the colors get messed up. Once you replace the sensor the tv should work like normal. The part is
(Sharp GP2S40 Photointerrupter). It is very difficult to find because they are not made anymore. Most major online part stores do not carry them but I found a lot of them at Wright Hobbies. Good luck.