HL-S5679W won't start three light blinking

Check the plugs in the power supply and make sure they are all in the right place. It wouldn't be the dmd ic or light engine. It would be the digital board.

Yes you would. On the power supply board under the heat sink. Do not upgrade the UF but you can upgrade the volts so if the caps say 10v 2200uf go to the 16v 2200uf and always make sure they are 105c degrees.

The Blinking light is an error code, most likely you just need to replace the bulb which is fairly easy, there is an access panel on the back and you should be able to replace your self. A new bulb should include basic instructions here is a link price is $110

http://www.buy.com/prod/samsung-hl-s5687w-hls5687w-bare-lamp-bp96-01472a/q/sellerid/28565179/loc/111/215199305.html

Replace Lamp,but CK to make sure Fans are running if OK then replace Lamp Mats Has them for 99.00
1-800-628-1118

There can be a few causes. One of the LED Modules has gone bad, The LED Driver board has gone bad and or the Power Supply has gone bad. You will need to have a good tech look into it.

Are all the lights blinking or just one or two? Respond to this post and I will assist you.

There are two capacitors on the power supply board that have probably gone bad. Look for domed tops or liquid coming out. This was the case for my TV and a few others. Check it out, the capacitors are only about $1 each at local electronics stores, but are hard to find... so call first.

Check the capacitors on the power supply first. If any have domed tops or signs of leakage, replace them. I had two go bad on mine. Call electronics parts supply stores first as these are not your average capacitors.

Apparently you can fix the issue by replacing a few faulty capacitors. I haven't done this yet, but plan to try it out next week.

http://www.bking01.com/Samsung_HLS5679.htm

http://www.avsforum.com/avs-vb/showpost.php?p=12845033&postcount=2060

Check the capacitors on the power supply first. If any have domed tops or signs of leakage, replace them. I had two go bad on mine. Call electronics parts supply stores first as these are not your average capacitors.