Mitsubishi wd 73638 I changed lamp and tv comes on but makes a clicking noise after a few seconds on and picture color not stable

No error code 61 listed, only a 66 error code which indicates lamp issues:
66
A) Lamp did not turn on at P-ON sequence... Check CJ4 circuitry
B) No Lamp Inserted............... No Lamp inserted
C) Disconnected cable between ballast and lamp.... HV connection or lead wire to lamp.
D) Lamp-Enable goes to PWB-MAIN but not to Ballast....Lamp Cartridge Failure

for lamp see the following web site: http://www.shopjimmy.com/dlplamps?tv_brands_select=Mitsubishi&tv_models=Mitsubishi+WD-73638
recommend using the manufacture part# as many replacements for Mitsubishi will not work.

I would think that the item to check would be the power supply. You will have to take the TV apart, get the board part number and see if you can find a replacement for it. I would recommend putting a meter to it to verify it is the board that is bad.

maybe the lamp ballast faulty try to replace the whole light engine

Mitsubishi WD-73638 User's Manual

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This is an LCD projection tv- there is no color wheel, have your tv serviced- cleaned, hopefully you dont have optical block issues. contact a service shop.

No.The tv have a colors wheel is dead.The colors wheel make loud motor noises,squiling noises and flashes picture with black&white.The colors wheel is dying and spinning off of it motor axis.Hire a Tv Tech. to change the colors wheel.Because is require take out alots machanical parts,before u can even come to the colors wheel itself to replced.

When was the Lamp last replaced,the lamp require changing.

Steady scrapping sound like a bad bearing is color wheel gone bad. Buzzing sound every 15 seconds is lamp bad.

I have the same tv and the same problem happened to me (Actualy twice). It turned out to be the color wheel motor. thats what the clicking noise is.