Dead T28s.Who wants to help? - GSM-Forum

starpho · 09-26-2001, 02:16

I have been changed PA module and phone still no power on nor recognize any software.I already tried to reflow all the componets within BGA balls and still nothing.What could it be????

pathan · 09-26-2001, 20:34

check if the pa ih getting hot you might have a short under pa

pathan · 09-26-2001, 20:36

check for shorts under the pa.

Skyfox · 09-26-2001, 22:02

Try to turn on the phone WITHOUT PA. (Its works).<br />If you phone will power on - you have one more dead PA.

Coonect you phone to Atr 5.3 and see - can it communicate with computer. Its somethimes can show you live you processor, memory, power chip or not.

If phone did not communicate - try to check 13Mhz crystal or change RF chip 11033.

If again not work - try to change 1011102 power chip (if you can). If again dont work - sorry... May be pcb or some other components. <img src="rolleyes.gif" border="0">

09-26-2001, 02:16	#1 (permalink)
starpho Freak Poster Join Date: Aug 2000 Posts: 144 Member: 1904 Status: Offline Thanks Meter: 3	Dead T28s.Who wants to help? I have been changed PA module and phone still no power on nor recognize any software.I already tried to reflow all the componets within BGA balls and still nothing.What could it be????

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09-26-2001, 20:34	#2 (permalink)
pathan Crazy Poster Join Date: Sep 2001 Location: uk Posts: 53 Member: 6467 Status: Offline Thanks Meter: 0	check if the pa ih getting hot you might have a short under pa

09-26-2001, 20:36	#3 (permalink)
pathan Crazy Poster Join Date: Sep 2001 Location: uk Posts: 53 Member: 6467 Status: Offline Thanks Meter: 0	check for shorts under the pa.

09-26-2001, 22:02	#4 (permalink)
Skyfox Insane Poster Join Date: Aug 2000 Location: Russia Age: 48 Posts: 96 Member: 1881 Status: Offline Thanks Meter: 1	Try to turn on the phone WITHOUT PA. (Its works).<br />If you phone will power on - you have one more dead PA. Coonect you phone to Atr 5.3 and see - can it communicate with computer. Its somethimes can show you live you processor, memory, power chip or not. If phone did not communicate - try to check 13Mhz crystal or change RF chip 11033. If again not work - try to change 1011102 power chip (if you can). If again dont work - sorry... May be pcb or some other components. <img src="rolleyes.gif" border="0">