HTC Blackstone Service Manual page 79

Doc. Title
4．Unusual Vertical / Horizontal lines or partial display
(1) Check the connection of LCM FPC whether is properly connected.
(2) Try to cold boot the unit then tries again.
(3) Try to re-flash the ROM code.
(4) Try with another LCM.
(5) Try with another Main Board.
(6) Replace LCM if necessary
(7) Replace Main Board if necessary.
(8) Once the defective part has been identified, verify it again with the defective part whether the symptom
could be duplicated.
5．Back Light Does Not Turn ON/OFF
(1) Check the connection of LCM FPC whether is properly connected.
(2) Try to re-flash the ROM code.
(3) Try with another LCM.
(4) Try with another Main Board.
(5) Replace LCM if necessary
(6) Replace Main Board if necessary.
(7) Once the defective part has been identified, verify it again with the defective part whether the symptom
could be duplicated.
6．CF/SD Card cannot be used
(1) Check whether CF/SD Card is fully inserted to the slot until you hear a click.
(2) Try to re-flash the ROM code.
(3) Try with another CF/SD Card.
(4) Try with another Main Board.
(5) Replace Main Board if necessary.
(6) Once the defective part has been identified, verify it again with the defective part whether the symptom
could be duplicated.
HTC CONFIDENTIAL
HTC Corporation
.
Blackstone Service Manual
Doc. No. DOC-00045694
Issued Date 2008/8/21
Revised Date 2008/11/6
Page 79 of 96
SM-TP001-0704
REV.
A01