[email protected] my HL-R6768w and the color wheel went bad so I changed it and everything went smoothly with the repair but now the tv wont turn on. the lamp lite on the front blinks and after 15 or 16 flashes the timer and standby lamp comes on but no picture no nothing. Please help.

This tv have a colors wheel,it dead.Require changing.Humming or vibrating sound,Flashes pictures black&white.The colors wheel is dead and it not spinning in it axis motor correctly anymore.Hire a tv Tech. to change the colors wheel,it very hard to change the colors wheel.Because u have to take out many machanical parts,even before u can get to the colors wheel itself.

Sounds that tv got color wheel problem that will be replaced.
If you are handy with electronics stuff repair then replace color wheel in light engine of tv to solve its issue.

Fire the TV Tech! Your problem is the adjustment to the color wheel timing. To correct this: With TV OFF -> on remote, press MUTE, 1, 8, 2, POWER. The TV will come up in service mode: ( Left / Right arrow keys for item selection, Up / Down to change values, Menu to return to previous menu, Power to exit Service Mode)

Enter the submenu of item 1. DDP1011. Now, adjust item 4. INDEX DELAY to correct the "clay facing" problem you are having . Default value is 47.

You should have a "problem" image paused to check you work if possible. I hope this was of some assistance, best wishes.

It could be a fan but most of the time it is the color wheel in the light engine. Samsung has a reputation for bad color wheels. Can be tricky to change and some had a circuit modification for new color wheel designs. Have a repair shop check it out. Should not be too expensive.

Look at the fan and verify its comming from the fan and not the power supply unit, you can clean the fan or replace it, but yes the fan would be likly the problem. Make sure you double check the power supply unit and clean if its needed,

Rulds2008

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/edwy_1a56970cf1ea4620

Go online and order a new color wheel. Take yours out first to see if that's the problem. Found mine on line for $101.00 shipping & Tax included.

You color wheel blew a bearing. You need to replace the color wheel.

The high-pitched whine is definitely the color wheel.  The early color wheels had problems and many had to be replaced.  As part of the turn-on process, the TV checks for light and then checks for color wheel sync.  If the bearings are wearing out/dried out, it could cause issues with getting the proper color wheel sync, causing the set to not pass the turn on sequence.
Check Sears or partstore.com for a color wheel.  I like sears for experimental replacements since they allow easy returns.
BTW, mine is an early 61".  My color wheel was replaced when I had to replace my Light Engine.  My in-laws 50" was an early one and theirs went out within 2 years.

Mine did that when the color wheel didn't spin up...just give it a whack where you installed the light & the wheel should spin up. I had to replace my color wheel as the bearing was shot & was buzzing all the time. The light won't come on if the wheel doesn't spin up first.

My 3 yr old Samsung DLP has the same buzzing noise, had a tech out today and he said "color wheel". Thank goodness I purchased that expensive warranty, This is my 4th repair in 3 years.