My Mitsubishi wd 62527 makes a grinding noise

Possibly the color wheel which is not available, you have to go with the optical engine which is part#: 938P015020
This would make repairs UNECONOMICAL

OR any one of 5 fans:
Chassis fan & Lamp fan: 299P288010 $20.00
http://www.shopjimmy.com/catalogsearch/result/?q=299P288010

PBS fan: 299P296010
Ballast fan: 299P287010 $25.00
http://www.shopjimmy.com/catalogsearch/result/?q=+299P287010

L/V fan: 299P295010 $27.00
http://www.shopjimmy.com/catalogsearch/result/?q=299P295010++

possibly 1 of the fans has noisy bearings.
chassis & lamp fans pt# 299P288010 $19.95@ http://www.shopjimmy.com/catalogsearch/result/?q=299P288010
PBS Fan pt# 299P296010 $65.83 http://www.tvserviceparts.com/cgi-tvserviceparts/sb/productsearch.cgi?storeid=*20aab4584c1a864062e01c3c70e68e24afb3&search_field=299P296010&search_submit.x=29&search_submit.y=12
Ballast Fan pt# 299P287010 $27.95 http://www.tvserviceparts.com/cgi-tvserviceparts/sb/productsearch.cgi?storeid=*20aab4584c1a864062e01c3c70e68e24afb3&search_field=299P287010&search_submit.x=29&search_submit.y=5
L/V Fan pt# 299P295010 $55.13 http://www.tvserviceparts.com/cgi-tvserviceparts/sb/productsearch.cgi?search_field=%20299P295010

otherwise color wheel bearings going out and is not available, must get complete light engine
pt# for WD-62527 938P015020 $629.66
http://www.tvserviceparts.com/938P015020.html

Economically the fans are not too bad, but the light engine would not be cost effective.To determine which fan may be causing the noise, you just have to listen closely to tell which one. or replace all 5 fans for a total of $188.81. you might want to replace the unit with a New LED TV. Replace TV is my recommendation. This unit is too old & antiquated to put this kind of money into it!!

hello there it could be a loose connector that u may have disturbed or broken look again inside if it worked before with
sound the chances are its ok

Called the blinking green light of death---set should if power lost when put back blink for 70 seconds or so---digital unit booting up.

About the only simple cause is in the main power supply are four 1000 uf caps that puff up and fail--provide boot up voltage.

follower power cord to supply and look for bad caps (they will be easy to spot) and see attached photos of what to look for.

http://www.mitsubishi-tv.com/pdf/ownersguides/WD-62527.pdf
You're welcome. :)

I would say so.

SPEAKER GRILLE Removal
Pull the SPEAKER-GRILLE away from the cabinet to remove.
SCREEN-ASSY Removal
1) Remove 10 screws (a) from the upper cabinet rear cover (3 screws on each side and 4 screws across the
top).
2) Remove screws (b) along the bottom of the SCREEN-ASSY (8 screws on 52 inch models, and 12 screws
on 62 inch models),
3) Unplug the LL connector to the front CONTROL-PANEL.
4) Lift the SCREEN-ASSY up slightly and then pull away from the cabinet.
CABINET FRONT DISASSEMBLY

i have had similar problems before for me it was caused by a strong magnet on the floor below me. i suggest looking around for a strong magnet that could cause the problem

bad lamp

This is generally a Power Supply problem, usually the SMPS so it's replacement or repair.