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Go Back   GSM-Forum > GSM & CDMA Phones / Tablets Software & Hardware Area > Sony Ericsson > Sony Ericsson Hardware Repair

Sony Ericsson Hardware Repair Post here your Hardware Repairing Hints or Problems with SonyEricsson and Sony Phones.

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Old 05-11-2002, 17:18   #1 (permalink)
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T28 "no display" water damage


I have T28 with water damage. I clear all gsm with alcohol....
But all work except display. Background LED are OK. I change with other good display but without success….
I try to unlock again with ATR53, 52, 50 but without success!
LCD is clear!!

Any good solution?
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Old 05-11-2002, 17:45   #2 (permalink)
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Try check 1 lcd pin in PCB
*if all voltage OK, you need check pcd with phone schem
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Old 05-11-2002, 18:04   #3 (permalink)
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T28 "no display" water damage

I have one good T28 and one in failure...
On both are same resistance....on PCB (display) connector!
left ro right:

1k3, gnd, 1k3, 700 E, n.c.

But display not work?!

I will investigate and report.....
I think hat is maybe SW problem.....?!
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Old 05-13-2002, 13:43   #4 (permalink)
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T28 "no display" water damage

I was found breaking PCB track at last contact (n.c.)
This track was breaking near LCD connector!
Good voltages are (from left to right):
2.75, gnd, 2.75, 2.75, 5.5V

I repair and all work good now!!

best regards,
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