That power cycling is not good for the unit. http://www.samsung.com/us/capacitorsettlement/ lists the HLT5087 so you should call it in and arrange for that work.
The DMD is another discussion. Did you need to read that again?
I have a samsung HLT5087 TV. Long story short, the picture stopped working, long cycling times at startup, but it eventually turns "on" although without picture; audio works. I can change the channels and see that white dots flicker, occasionally the blue box with the channel number comes on. Sometimes distorted screen images, but mostly black with occasional static.
Have it repaired 6 months ago, after having someone look into the caps (figured it might be a power issue since it was cycling many times, but the caps looked fine). Turns out it was DMD board. With the DMD board replaced, it starts working.
A month ago, red LED goes out, figure I'll replace it. Before I can get around to that, it is having the weird picture problem described earlier.
I talked to a rep and they said they could offer me a one-time repair. I declined, hoping to get my last repair paid for instead, and maybe there is some underlying problem that is killing the DMD board/picture. Get transferred to exec. care, they say they can't do anything.
TV has been used < 1800 hours, kept in good conditions, good ventilation, normal temperature range. Sick and tired of getting the runaround by Samsung; obviously I'm not going to get the DMD board replaced and have the same thing happen again.
The problems with the DMD boards and power supplies on these forums/other forums are numerous. I'd like to have Samsung at least admit that there is something wrong with the DMD boards on the HLTXX87 sets, and possibly provide some kind of solution besides just replacing the DMD board every couple of months.
Anyway, I suspect a power issue since replacing the DMD board only helped temporarily. Any ideas?