This weekend I ordered a new sheet of polarizing film for my 1999 Honda TRX450S on Amazon and replaced it. It was a fairly simple straight forward process. I replaced myn because it was not visible at all and it looked to have had water in the screen at some point.
Polarizing Film: https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
Thick piece of clear plastic.
Flat Head and Phillips Screwdrivers
1: Remove Cage around 3rd headlight.
2: Remove flat head screw below display.
3: Cover comes apart with a little prying.
4. There are 4 nuts holding the display on to the mount remove them.
5. Remove fuel tank fairings and fuel tank and the inner fender covers.
6. The connector to the display is located forward and left of the fuel tank.
7. Carefully disconnect the connector. (If your atv is anything like myn I like to get it dirty. Pull the disconnected connector back through the fairings and through the hole in the mounting bracket.
8. Remove the 4 round covers on the back of the display and remove the 4 screws behind them.
9. The cover on the display will come apart fairly easily. (I used a razor blade and very gently pried them apart).
10. There are two screws holding the circuit board to the back of the display cover remove them.
11. On the backside of the circuit board there are 5 screws holding the LCD screen to the circuit board remove them.
12. Remove the plastic cover that is holding the lcd glass in place.
13. Very carefully remove the LCD glass and peel the white connector away from the board.
14. With a hot knife or razor blade VERY CAREFULLY remove the polarizing film. (Clean really good)
15. Reconnect the connector and put the polarizing film between the Circuit board and the LCD Glass. (You will have to press kind of firmly and turn the key on) If you do not see anything on the display turn the film over or change the direction of the film until you see something on the display. Once lined up properly you will know. (Do it with the lights on and off, make sure you look at it from different directions too to make sure its the correct direction)
16. Cut the film with a knife or scissors to fit. (I also found a thick piece of clear plastic to put behind the polarizing film to sandwich it in place.
17. At this point I put the Screen back in the plastic holder and place the polarizing film and the thick piece of plastic behind it.
18. I then used a tiny piece of tape on either side to hold everything in place while I put the Screen and surround back on the circuit board.
19. Screw the 5 screws back in and 2 screws holding the circuit board to the back cover.
20. TEST, TEST, TEST!! plug your display back into the connector and turn the key on. (I had to take myn apart several times because I either put something on backwards or the thin white strip with the connectors wasnt touching all the way across) PATIENCE!! Do not try to rush it will only cause you more issues.
21. Once you have verified the display is working and clearly and visible start re assembly.
1. With the lcd and surround now mounted back on the circuit board and the circuit board screwed back down the the display back piece start re assembly.
2. I put a small bead of clear caulk around the edges of the back pate. (For the life of me I could not get the gasket to stay on between the front and back covers).
3. Once down carefully put the front cover back on and flip over.
4. Put the 4 screws holding the back and front plate together in. (I filled the holes with caulk after I put the screws back in).
5. Place the small round covers back on the back cover.
6. Put the display back on the bike and fish the cable back through.
7. I highly recommend using some dielectric grease on the connector as myn was a pain to get apart. (I thoroughly cleaned the connector with alcohol before electric grease).
8. Enjoy your newly refurbished LCD screen for about $10 in supplies.