T191 display fault - GSM-Forum

SE-THAILAND · 11-29-2002, 17:35

hi all

i have problem with T191.when power on phone it not anything on LCD but keypad and light no prolem.can anyone help

bye

SPUnlock_SK · 11-29-2002, 21:27

reflash or reball CPU or replace CPU

SE-THAILAND · 11-30-2002, 11:56

hi SPUnlock_SK

ok i'll try replace CPU and post for result .but i think CPU not damage cause my phone can make call without problem.i check voltage at LCD connector pin 10 is 2.8v but good phone is 7.5v
can you tell me ?.where i can find servicemanual for it

thank for reply

xmobile · 12-01-2002, 14:51

Replace TWL3011

SE-THAILAND · 12-05-2002, 21:49

xmobile

i try replace TWL3011 but still not work.next time i'll try replace CPU but it not easy.if anyone solve this success without replace or change CPU please tell me

bye

george gsm · 12-07-2002, 00:26

hi srtech,
i replaced already some cpu. not easy but works and good results. usualy under cpu is a white glue. i use hotair 300celsius degree(not more then 300) and moderated air pressure. first i puting up the cpu. second i clean the glue on the board and ic(ic is fixed on the table). after that remake balls and resolder .
b.r.
geo

SE-THAILAND · 12-07-2002, 17:56

hi george gsm

today i try swap CPU with good phone but still not work.and now CPU not damage.how to check for next step

mulu · 12-22-2002, 22:23

hey!! clean the pcb and rebolw for few minutes everywhere in the lover part where the cpu and flash is....it wiill work 100%

SE-THAILAND · 12-25-2002, 11:54

thank for your info but this trick not work for me

SE-THAILAND · 01-28-2003, 07:13

still silent for this problem

11-29-2002, 17:35	#1 (permalink)
SE-THAILAND No Life Poster Join Date: Mar 2002 Location: khonkean,thailand Posts: 741 Member: 10084 Status: Offline Thanks Meter: 283	T191 display fault hi all i have problem with T191.when power on phone it not anything on LCD but keypad and light no prolem.can anyone help bye

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11-29-2002, 21:27	#2 (permalink)
SPUnlock_SK No Life Poster Join Date: Jul 2002 Location: Slovakia Age: 43 Posts: 1,535 Member: 13922 Status: Offline Thanks Meter: 334	reflash or reball CPU or replace CPU

11-30-2002, 11:56	#3 (permalink)
SE-THAILAND No Life Poster Join Date: Mar 2002 Location: khonkean,thailand Posts: 741 Member: 10084 Status: Offline Thanks Meter: 283	hi SPUnlock_SK ok i'll try replace CPU and post for result .but i think CPU not damage cause my phone can make call without problem.i check voltage at LCD connector pin 10 is 2.8v but good phone is 7.5v can you tell me ?.where i can find servicemanual for it thank for reply

12-01-2002, 14:51	#4 (permalink)
xmobile Major Poster Join Date: Sep 2002 Location: Novi Sad,YU Posts: 43 Member: 15650 Status: Offline Thanks Meter: 0	Replace TWL3011

12-05-2002, 21:49	#5 (permalink)
SE-THAILAND No Life Poster Join Date: Mar 2002 Location: khonkean,thailand Posts: 741 Member: 10084 Status: Offline Thanks Meter: 283	xmobile i try replace TWL3011 but still not work.next time i'll try replace CPU but it not easy.if anyone solve this success without replace or change CPU please tell me bye

12-07-2002, 00:26	#6 (permalink)
george gsm No Life Poster Join Date: Jul 2002 Location: Bucharest-Romania Age: 51 Posts: 1,160 Member: 14200 Status: Offline Sonork: Sonork id Thanks Meter: 117	hi srtech, i replaced already some cpu. not easy but works and good results. usualy under cpu is a white glue. i use hotair 300celsius degree(not more then 300) and moderated air pressure. first i puting up the cpu. second i clean the glue on the board and ic(ic is fixed on the table). after that remake balls and resolder . b.r. geo

12-07-2002, 17:56	#7 (permalink)
SE-THAILAND No Life Poster Join Date: Mar 2002 Location: khonkean,thailand Posts: 741 Member: 10084 Status: Offline Thanks Meter: 283	hi george gsm today i try swap CPU with good phone but still not work.and now CPU not damage.how to check for next step

12-22-2002, 22:23	#8 (permalink)
mulu Freak Poster Join Date: May 2002 Location: MV Age: 49 Posts: 113 Member: 11622 Status: Offline Thanks Meter: 0	hey!! clean the pcb and rebolw for few minutes everywhere in the lover part where the cpu and flash is....it wiill work 100%

12-25-2002, 11:54	#9 (permalink)
SE-THAILAND No Life Poster Join Date: Mar 2002 Location: khonkean,thailand Posts: 741 Member: 10084 Status: Offline Thanks Meter: 283	thank for your info but this trick not work for me

01-28-2003, 07:13	#10 (permalink)
SE-THAILAND No Life Poster Join Date: Mar 2002 Location: khonkean,thailand Posts: 741 Member: 10084 Status: Offline Thanks Meter: 283	still silent for this problem