Thanks for the info. This TV has history of failing capacitors on power supply board and some times main board also found for on-off cycle, however, power board is most common cause of delayed power On problem.
Picture quality issue is related to display panel (the screen) as it wouldn't be getting correct/ constant volts to function properly OR t-con board mounted on rear of screen under metal shield is defective OR internal circuitry of screen has failed and causing the picture problem (washed out, pixilation image etc).
Please either replace bad capacitors or entire power supply board to resolve the delayed power up problem and it might also fix the washed out picture issue as well, or you would need to swap t-con board to see if it fix the picture quality problem and if it doesn't then most likely it would be display panel (screen) problem which wouldn't be economical repair because screen replacement would cost more than new TV price of same size if Samsung Parts still have it in stockand you would be better off with an new TV.
Please click following supplier link to get required capacitors or power supply board or search/ google it with the part number off of label pasted on power board inside TV to get better price info..
I trust my input will help you out. Please feel free to respond if you have any additional questions.
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