check fan error comes on screen.. and then shuts t.v. down.. we have had in shop many times.. and they can't figure it out.. it doesn't do it when it's there.. however they are loading it in the back of a truck.. and then driving down the road.. so i think it may be blowing the fans out..
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Check and replace its color wheel. Contact any service technician. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" will make surf easy. http://electronicshelponline.blogspot.com/
Did you use an original replacement lamp or an aftermarket replacement? From the price you give, it sounds like an aftermarket lamp, which are notoriously buggy and the problem may be with the lamp. If not, the lamp driver is your next likely culprit. It is also called a lamp power supply or lamp ballast.
Since the lamp generates a lot of heat, the fans are continuously monitored for correct function. The owner's manual should show you the location of the fans. Make sure that the grills covering the fans are clear of dust and that the fans are clean. Sometimes dirt can cause the fan blades to slow down enough to trigger the safety alert.
I had the same problem and stumbled on the fix. It seems there is a factory defect. Open the lamp cover and you will probobly notice that the blue shut off switch on the left side is landing on top od the lamp cover. Reach down with a pencil or something and make sure the switch is under the tab on the lamp cover. My 50 DLP has not shut down since I set the switch properly. Free fix... try it.
When the set shuts down you need to see what lights are blinking. For example: Timer/ Temp/ lamp on the front panel. You should also count the number of times they blink and the sequence. Most DLP`s give an error code alerting the technician to check the balast, lamp, or fan etc. for malfunctions. Unfortunately I can not tell you exactly what is wrong given the current information. Howrver, the last Samsung I repaired for shutting down had a bad light engine.