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Hi Karen, i guess that the problem is hardware problem not software..i don't know exactly what's the problem, if you tried installing new software for your phone and that doesn't fix it, that mean its hardware problem.
LCD change on 7373. This will take you to the connector.
Switch off the phone.
Take SIM card out.
Take front faceplate off by inserting Credit card/Tweezers between housing and silver key. As you pull up, take credit card and slide it on the side of the phone prying the clips off. (Gently tease it out working around the phone)
Unscrew these 6 screws at the edges with the T6 screwdriver and release the 4 clips surrounding the LCD screen. Slip the little black frame off of the LCD screen, and lift the screen. (Prize it up gently from the swivel end of the mob.) There’s a printed circuit board underneath it is attached to the LCD by a hook type catch. Don’t damage it (the board). You should now see a screw. Removing this screw removes the back cover.
That’s it! Put your new faceplate or housing in and figure out how to put things back by following the directions here in reverse order.
You should use anti static gloves for this job, avoid touching the connections and the LCD face.
This might work:
Switch off. Take your SIM card out. Make sure your phone battery is fully charged. Press* 3 sendat the same time and turn the phone on. Keep them pressed until the reset screen appears.
Give it time to reset.
Yes! I know, you need someone to press the ON button.
there is a chance of display being spoilt and dry soilder near the display connector. and if the mmc is not able to access then u need to replace the mmc reader IC
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