I thought I had a bad bulb. Took out the old one and it was black and melted looking on the inside. Bought a new bulb and put it in the 61 inch DLP and the lamp light is still blinking yellow. I have no picture at all . Please help very frustrated. Thanks Rich

if the power LED is flashing green then there is a circuit or board that either has a blown fuse or relay. if it comes on solid red when you turn on the television then the Lamp inside is burned out and needs replaced. Before you spend all the money that changing the bulb would cost i would invest that money in a good LED Smart TV instead. Sometimes you just gotta let that old technology go away.

I hate being the bearer of bad news, had the same problem, and I found out that the problem with DLP is that after so long, nothing that you do will fix it. A TV repairman offered me $100 for my set and I took it, that was 2 years ago and it still goes through bulbs and ballast several times a year. Now when i see him he always says I never should have taken that TV. It never plays long enough to sell it.
On a liter note: 4k si approaching $1000 now, that's the way to go.

You check the power supply section and the horizontal section

It could be the temp sensor going bad. This sensor sits on top of the metal housing which the bulb assembly slides into. The bulb assembly will have a hole on top and this is where the sensor is above. There is a small blue and white wire that plugs into it. If you pull the wire out and put a paper clip or wire in the coupling you will basically bypass the sensor connecting the blue and white wire. If your tv turns on then that is your problem. Its cheap too. Here were my symptoms..1] Turn tv on 2] Bulb would light up..(which eliminates the ballast) regular picture would show up (which eliminates the bulb and color wheel) 3] 30 seconds later tv would shut down with 3 flashing lights. After bypass the tv turned on as always and hasnt shut down yet. Always un plug tv first. Get the replacement part to avoid overheating and possible fire

I would say it will cost you 250 - 300 pounds. if you have warranty on your tv phone samsung.

Bad news.  Mine did the same thing.  Mine is the 61", but the internals are basically the same.  I replaced the lamp and the problem was fixed.  Then after a couple days, it died again.  I replaced the ballast, to no avail.  Took it to the certified repair center and they said I needed a new DLP Light Engine.  They wanted $1250 to fix it, but I was able to order one online from partstore.com for $700 and fixed it myself.  No problems since.
Your certified repair center will charge a minimal fee to diagnose and then you can fix it yourself if you choose.
The easist fixes for the lamp problems are A) replacing the bulb and B) replacing the ballast.  Anything else, you'll want a certified tech to diagnose the problem.

Yes, the lamp will gradually get darker as it nears it's end. The rolling lines sounds more like the set is on a local channel for the cable hook up. If your local area has a channel 3 or 4 live terestrial broadcast simply tune the cable box output to the other one, the same for the tv.
If this is cable/local broadcast issue it will go away in Febuary when the NTSC broadcast ends.

This unit has a bad colorwheel

all 3 lights blinking means lamp has a fault the service manual says replace the lamp. If you need the service training manual for that model let me know and I will post the link as the training manual has excellent trouble shooting breakdowns for that model DLP

That certainoy sounds like the color wheel assembly inside of the light engine is bad. The light engine is located here http://www.samsungparts.com/part_detail.asp?catalog%5Fname=Parts+and+Accessories&product%5Fid=BP96%2D00674A&search%5Fmodel=HLP4663W Good Luck