S25 with no light on display - GSM-Forum

fontelense · 04-22-2002, 04:51

I have one unit with this problem.
The keypad leds turn on normally, but the light on the display is always off. I have tried the display/ keypad board on another unit an all is fine. Could it be from a defective MMI connector, on the main board side? Any help would be appretiated.

Best regards

Fontelense

Raheeeeb · 04-23-2002, 18:36

just resoldier tghe three connection of the screen and the pcb and add more past material

genocite · 04-23-2002, 20:16

could be bad connection in 3 contact points, defective connection cable flexible, damage 6 leg controlling ic located near the con cable flexible in rf board, or a broken power coil

fontelense · 04-24-2002, 07:49

Ok, tanks for the help. I´ll test it.
All the rest is working fine, except for the ringing volume, which is extremely low. My guess is that 6 leg IC, but there are two located near the conector. Which one, on the left or in the middle?

Best regards

Fontelense

genocite · 04-24-2002, 08:14

should be the left one, ringing tone is another problem, change the ringing coil

04-22-2002, 04:51	#1 (permalink)
fontelense No Life Poster Join Date: Sep 2001 Location: Portugal Age: 50 Posts: 618 Member: 6358 Status: Offline Thanks Meter: 10	S25 with no light on display I have one unit with this problem. The keypad leds turn on normally, but the light on the display is always off. I have tried the display/ keypad board on another unit an all is fine. Could it be from a defective MMI connector, on the main board side? Any help would be appretiated. Best regards Fontelense

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04-23-2002, 18:36	#2 (permalink)
Raheeeeb No Life Poster Join Date: Oct 2001 Location: -------- Age: 55 Posts: 1,009 Member: 7062 Status: Offline Thanks Meter: 126	just resoldier tghe three connection of the screen and the pcb and add more past material

04-23-2002, 20:16	#3 (permalink)
genocite No Life Poster Join Date: Jul 2001 Location: md Age: 25 Posts: 761 Member: 5379 Status: Offline Thanks Meter: 0	could be bad connection in 3 contact points, defective connection cable flexible, damage 6 leg controlling ic located near the con cable flexible in rf board, or a broken power coil

04-24-2002, 07:49	#4 (permalink)
fontelense No Life Poster Join Date: Sep 2001 Location: Portugal Age: 50 Posts: 618 Member: 6358 Status: Offline Thanks Meter: 10	Ok, tanks for the help. I´ll test it. All the rest is working fine, except for the ringing volume, which is extremely low. My guess is that 6 leg IC, but there are two located near the conector. Which one, on the left or in the middle? Best regards Fontelense

04-24-2002, 08:14	#5 (permalink)
genocite No Life Poster Join Date: Jul 2001 Location: md Age: 25 Posts: 761 Member: 5379 Status: Offline Thanks Meter: 0	should be the left one, ringing tone is another problem, change the ringing coil