TV makes a loud grinding sound periodically. When turned off and then back on the noise stops temporarily

does not sound correct. Perhaps the laser is hitting the DVD, or a gear is dirty. Anyway, if you keep playing with a strange noise in the player, it won't take long before it stops complete, or till you destroyed all your DVD's When you don't see scratches on the silver side of the DVD's, you should check (or let a technician check) what can be wrong with the player.

Check front tyres & wheel bearings espesially the R/H/F. Feel tyre for high / low spots on inside & jack up & spin wheel if you get noise while jacked up it is not the tyres but wheel bearing or brake pads but more than likly a crook bearing by the sound of it. It needs to be tended to ASAP

Try some WD40 on the silver shafts that the carrier slides on they do get very gummy.

DickyO

I would investigate the transfer case. By your description here it sounds as if the gears inside are worn and the drive chain inside is rubbing, causing the loud noise you hear.

Back up your files and buy a replacement drive the grinding noise is the hard drive experiencing mechanical failure and may stop working soon.

this sounds like the motor went out

if its brand new it shouldnt be making a loud grinding noise id get it checked make sure they removed all shipping bolts

If it is a buzzing noise, it is the Ballast for the lamp.
If it is more of a grinding sound, it is the Color Wheel motor.
Does it go away when you turn off the tv? If so, does it stop abruptly or does the sound tend to get softer (winding down noise)
If the noise stops abruptly it is probably the Ballast.
If the noise takes several seconds and seems to get softer until it stops about 30 sec later then it is the color wheel motor.
Richard Bartlett

sounds like you have a problem with the cooling fan

Hi, I'm not sure if it's the same problem I had..
I had it on picture mute, for maybe 15 mins, which may not have been a good idea. While it was muted, it made a sparking sound, and then a very loud grinding noise. When turned off, the lound noise stops, and the fan continues as usual for about a minute. As soon as it's turned back on, the grinding noise is back. But the logo seemed to display ok.

I took it in for repairs, and they said they needed to replace the color wheel to fix the problem.

optoma dv10 mode