c905 BACK LIGHT PROBLEM - GSM-Forum

chowdary · 06-18-2009, 23:02

Hi
i have got a c905 with no back light,
it came in with top right key problem, i changed the flex,
with the new flex,soon as i put the battety in, top keypad light came on, so dissambled it again and tried the original flex in it but now i have got no back light,
i've tried this flex, top keybordm and lcd on another pcb. They work fine,
any sugesstions please
thanks

chowdary · 06-19-2009, 20:56

Hmmmmm............
Looks like no one has got this solution

chowdary · 06-26-2009, 19:49

now i have got another one with no lcd light
i have checked connectors, grips are closed properly
everything works but no lcd light.
please any expert has solution for it
thanks

ionutGSM · 08-27-2009, 15:02

Quote:

Originally Posted by chowdary

now i have got another one with no lcd light
i have checked connectors, grips are closed properly
everything works but no lcd light.
please any expert has solution for it
thanks

i have same problem anyone have any ideea???
br

dejanp · 09-03-2009, 01:08

i have same problem too

yunaced · 09-03-2009, 01:22

also encountered this problem i replace ribbon twice still no back light at LCD

anyone has a solution please

TIA

love&q · 09-03-2009, 13:15

this problem due to LCD light control IC.
when the phone a while u can feel the CPU hot.
but how to fix i got no idea.

indiatel · 09-03-2009, 19:14

100% solve u r problem
i put 2k2 coil from n73 bord 100000% work change also diode from p910 bord

Repair4u · 01-28-2010, 19:31

Quote:

Originally Posted by indiatel

100% solve u r problem
i put 2k2 coil from n73 bord 100000% work change also diode from p910 bord

listen boss,which board is in your picture,cant get it n73 or c905 ,i put it all the way cant undrstand,can u tell me thnks in advance

ad_bobeica · 02-03-2010, 11:07

Quote:

Originally Posted by indiatel

100% solve u r problem
i put 2k2 coil from n73 bord 100000% work change also diode from p910 bord

Yes! Goog solution, mann! It's working. I use the coil near from the big camera connector from N73 board. B.R.!

gsmcomm · 02-04-2010, 14:31

please help no lcd light in c 905

dreameye · 02-04-2010, 14:34

i solved this by getting light coil... diode... caps.... from k850 board

try i tested with 3 sets..

mubeen s · 05-14-2011, 10:57

i have one c905 no display back light ..........

06-18-2009, 23:02	#1 (permalink)
chowdary No Life Poster Join Date: Nov 2004 Posts: 1,980 Member: 91102 Status: Offline Thanks Meter: 34	c905 BACK LIGHT PROBLEM Hi i have got a c905 with no back light, it came in with top right key problem, i changed the flex, with the new flex,soon as i put the battety in, top keypad light came on, so dissambled it again and tried the original flex in it but now i have got no back light, i've tried this flex, top keybordm and lcd on another pcb. They work fine, any sugesstions please thanks

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06-19-2009, 20:56	#2 (permalink)
chowdary No Life Poster Join Date: Nov 2004 Posts: 1,980 Member: 91102 Status: Offline Thanks Meter: 34	Hmmmmm............ Looks like no one has got this solution

06-26-2009, 19:49	#3 (permalink)
chowdary No Life Poster Join Date: Nov 2004 Posts: 1,980 Member: 91102 Status: Offline Thanks Meter: 34	now i have got another one with no lcd light i have checked connectors, grips are closed properly everything works but no lcd light. please any expert has solution for it thanks

09-03-2009, 01:08	#5 (permalink)
dejanp No Life Poster Join Date: Sep 2004 Location: Serbia Posts: 847 Member: 82990 Status: Offline Thanks Meter: 106	i have same problem too

09-03-2009, 01:22	#6 (permalink)
yunaced No Life Poster Join Date: Jan 2008 Posts: 1,171 Member: 683463 Status: Offline Thanks Meter: 188	also encountered this problem i replace ribbon twice still no back light at LCD anyone has a solution please TIA

09-03-2009, 13:15	#7 (permalink)
love&q Freak Poster Join Date: Jan 2004 Posts: 284 Member: 51061 Status: Offline Thanks Meter: 1	this problem due to LCD light control IC. when the phone a while u can feel the CPU hot. but how to fix i got no idea.

02-04-2010, 14:31	#11 (permalink)
gsmcomm Insane Poster Join Date: Oct 2009 Location: algeria Posts: 99 Member: 1136177 Status: Offline Sonork: 1613648:gsmcom Thanks Meter: 5	please help no lcd light in c 905

02-04-2010, 14:34	#12 (permalink)
dreameye Freak Poster Join Date: Mar 2008 Location: sri lanka Age: 37 Posts: 428 Member: 728801 Status: Offline Thanks Meter: 67	i solved this by getting light coil... diode... caps.... from k850 board try i tested with 3 sets..

05-14-2011, 10:57	#13 (permalink)
mubeen s Junior Member Join Date: Jan 2011 Posts: 31 Member: 1505868 Status: Offline Thanks Meter: 1	i have one c905 no display back light ..........