GSM-Forum - View Single Post - K850: LCD display problem; picture atteched.

PSG · 11-30-2008, 20:40

i check all steps in 'display illumination problems" section of service manual. and here it's:
i don't have LCD backlights
i have 3.8V at MP 26 but when i press button to activate backlight i don't have 15V at mp 26 but i have 3,8V at MP 49 so i think i should replace V4200(manual steps)
questions:
1) i don't have new v4200 could you tell where i will find that v4200? which SE phones has got same v4200?

2) is it right thinking: v4200 operate only with backlight so i should see things on LCD but without backlight only, or when v4200 is damage i will not see anything like now?

11-30-2008, 20:40	#5 (permalink)
PSG No Life Poster Join Date: May 2003 Location: POLAND Posts: 1,262 Member: 27761 Status: Offline Thanks Meter: 55	i check all steps in 'display illumination problems" section of service manual. and here it's: i don't have LCD backlights i have 3.8V at MP 26 but when i press button to activate backlight i don't have 15V at mp 26 but i have 3,8V at MP 49 so i think i should replace V4200(manual steps) questions: 1) i don't have new v4200 could you tell where i will find that v4200? which SE phones has got same v4200? 2) is it right thinking: v4200 operate only with backlight so i should see things on LCD but without backlight only, or when v4200 is damage i will not see anything like now?