While watch tv last night heard a crakle and we lost the picture on our samsung dpl tv. We got a new lamp and installed it. There is still no picture.

sounds like a bad color wheel

the light source is out. the new lamp will cost around 250 easy fix.

Most likely needs a new lamp. Easily done yourself.

power pack capacitors have failed they will need to be replaced with new ones and that should repair the tv, soldering skill is required to do this or replacement of the entire power pack.
hope this helps

after picture is lost, does the screen remain lighting?

Power issues (Tv not turning on) were typically due to faulty ballast. While the TV reports a bad lamp it is the ballast itself causing the issue. Samsung is well aware and will replace both the ballast and the lamp (since the lamp can be prematurely aged but the bad ballast). After replacment most people stop having issues.

ysus pcb that supplies voltage to the panel is faulty

sounds like it may be a software upgrade

HLS4266W 43" dlp. In less than 1 yr whining grew worse, but did know what it was. Year passed with warranty and lamp went out. Replaced lamp. Worked for 3.5 hrs. Turned on next day and did not work. Got another lamp, but did not work. Figured out might be color wheel. Replaced it too. TV started up. Watched that night. Turned on next day, heard loud pop. Lamp never came on. Withdrew and reinstalled lamp a couple times to see if that worked. Did not. Currently, with new lamp and color wheel installed, lamp light blinks, but no lamp comes on. What now?