This is a how to repair guide for the HTC 620 / HTC 621 mobile  phone.  Commonly referred to as the T-mobile Dash.   For some reason,  the LCD screens on the Dash seemed very prone to breaking if you carried  in your pocket or dropped it once.
The good news is you can  repair it yourself.  A new LCD for the t-mobile Dash runs about 30  dollars on eBay and the procedure is pretty straight forward.  Be glad  it’s not a slide phone!  Yeesh, changing LCD screens on that type of  phone is a pain!
This guide is for replacing the LCD on your T-mobile Dash.  This will  fix a dead back light, no display, cracked LCD screens, shattered LCD  screens and just dead Dash LCD Screen in general.  If you have an HTC  Excalibur with a broken screen then this procedure will work for you as  well.
So without rambling by me, I present to you the HTC 6201/621 Dash LCD Screen Replacement Guide!!
Tools needed:
T6 torx Driver and some type of flat tip device for prying covers off.  A plastic guitar pick is my favorite choice.
Instructions:
- Turn of phone and remove battery and back cover.
 - Remove SIM card and memory card if installed.
 - Remove 4 screws around the side of the phone.
 - Remove  the screw caps on top backside and remove 2 screws underneath. The pry  device is handy for removing the little black covers.
 - Remove  the back cover.  Using the guitar pick, insert it into the button and  work it around the cover. There are 4 snaps that need to be release to  remove the cover. See the picture below for the approximate locations.
 - Remove the 1 screw on the main board. It is located in the corner near the camera.
 - Release and disconnect the LCD connector. Lift the little brown retaining bar up. See below for reference.
 - Remove the keypad connector in the bottom left corner. Lift gently from the corner of the connector.
 - Remove the connector at the top of the main board.  Lift  brown retaining piece up  and slide out the cable. 
 - Lift  the main board off the top cover. Loosen the board from the cover by  running your removal tool of choice arounf the edge.  Please use  something plastic for this.   Grasp firmly and pull up and over.  See  pictures below for reference.
 - Align the connectors and gently lift up the bottom side cover. Work the cables gently through the openings.
 - Remove the T-mobile Dash LCD Screen.  
 - Install the new LCD screen.
 - Align  the connectors and gently install the bottom side cover. Work the  cables gently through the openings and push cover into place.  
 - Gently install the main board back into place.
 - Reconnect the 2 cables removed in steps 8 and 9.
 - Install the LCD cable back into the connector.  Make sure it is seated snugly and then push retaining clip down.   Caution: Failure to properly seat connector can cause a white display or no image on LCD at all
 - Install the screw removed in step 6 back into the main board.
 - Double check all of the connections to make sure they are seated firmly.
 - Install the back cover on. Make sure to firmly snap back into place all around the edge.
 - Install the 4 screws from the sides.
 - Install the 2 screws on the top.
 - Install the battery and the battery door.
 - Power on your HTC 620 / 621 and check out the new LCD.
 - If the LCD is white or not functioning properly, go back to step 17 and make sure the cable is seated firmly.
 
That  is all there is to it.  Go out and enjoy your newly repaired T-mobile  Dash with its fully functional LCD Screen in all it’s splendor!
If you need a new LCD Screen for your T-mobile Dash, check out the link below.
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