9900 LCD dissappear - GSM-Forum

kwaku85 · 01-28-2015, 17:53

Hello!
I have BB9900 with strange problem. Phone start booting normaly, but when Blackberry logo appear, screen go black and backlight dissappear after 2/3 sec. Phone is still booting (can hear start melody).
I have change FW, U1303 IC and L1305 coil. Still nothing. Any ideas?

soctia · 01-29-2015, 02:57

You need to get a battery!!!!

Munir · 01-29-2015, 06:04

Quote:

Originally Posted by kwaku85

Hello!
I have BB9900 with strange problem. Phone start booting normaly, but when Blackberry logo appear, screen go black and backlight dissappear after 2/3 sec. Phone is still booting (can hear start melody).
I have change FW, U1303 IC and L1305 coil. Still nothing. Any ideas?

In your case 2 doubt
1.HOLSTER SENSOR U1702 change or check related parts.
2.one control line CBABC_PWM comes from lcd to U1303 via U1309 which oprate back light.so once change lcd otherwise change U1309 and check its link.

Subber · 01-29-2015, 08:13

I think you need to change a battery again

kwaku85 · 01-29-2015, 12:06

I was Holster sensor. One of Holster coil was water damaged, and when Holster driver was loaded- LCD goes off. Now everything is working. Thanks!

01-28-2015, 17:53	#1 (permalink)
kwaku85 No Life Poster Join Date: Jan 2006 Location: Poland Age: 39 Posts: 630 Member: 219917 Status: Offline Thanks Meter: 60	9900 LCD dissappear Hello! I have BB9900 with strange problem. Phone start booting normaly, but when Blackberry logo appear, screen go black and backlight dissappear after 2/3 sec. Phone is still booting (can hear start melody). I have change FW, U1303 IC and L1305 coil. Still nothing. Any ideas?

01-29-2015, 02:57	#2 (permalink)
soctia No Life Poster Join Date: Jun 2006 Location: JAMAICA Posts: 2,093 Member: 293299 Status: Offline Thanks Meter: 264	You need to get a battery!!!!

01-29-2015, 08:13	#4 (permalink)
Subber Junior Member Join Date: Jan 2015 Posts: 4 Member: 2336365 Status: Offline Thanks Meter: 0	I think you need to change a battery again

01-29-2015, 12:06	#5 (permalink)
kwaku85 No Life Poster Join Date: Jan 2006 Location: Poland Age: 39 Posts: 630 Member: 219917 Status: Offline Thanks Meter: 60	I was Holster sensor. One of Holster coil was water damaged, and when Holster driver was loaded- LCD goes off. Now everything is working. Thanks!