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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 12-08-2002, 22:52   #1 (permalink)
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t20 problem


i have 2 or 3 dead t20.....i use flesher to flash it and now thay can turn on...but all of them are sayng.."no acess"

could it be an software problem???

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Old 12-08-2002, 23:07   #2 (permalink)
legija
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1.PA
2.Antenna switch
3. External antenna connector
4. Maybe, just maybe, RF processor
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Old 12-11-2002, 02:11   #3 (permalink)
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legija....i changed all that.....and nothing...

is there posible that problem is in software???

software and hardware does not match?
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Old 12-11-2002, 03:34   #4 (permalink)
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1) In most of the cases it is the antenna connector ( best way to check is to solder a copper wire and then check, if working fine 100% antenna connector)

2) The second test can be done with a fancy sticker which lights up when we make or receive a call. If it is not lighting up then it could be a PA or antenna switch problem.

3) If not then it is the RF processor.

But make sure you are not using high temperature while soldering these components and don't **** heat over them . Jus place them and **** heat around them . Cause many of them get damaged while fixing itself , this I found out through experience.
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Old 12-11-2002, 17:05   #5 (permalink)
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try also to change EEP and resolder the other IC`s
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Old 12-11-2002, 23:19   #6 (permalink)
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I think it will be a software problem, after flash you must change Eeprom and recalculate crc with varanius soft. It will solve your network problem.

Regards.
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Old 12-11-2002, 23:33   #7 (permalink)
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rewrite eeprom
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