K850: LCD display problem; picture atteched. 1 Attachment(s) hi i have K850 water damaged. phone working OK but there are some problems with mainboard. i found one missed thing. i tried to make connection between that two solder points but after that step phone has got shortcirrcut and immediately power station display 0 volt of consumed power. i think it's not a fuse. i attached picture so please advice me what part is missing there. maybe same parts are located at left connector which is near that one. |
1 Attachment(s) Quote:
Rashid Ahmed Nadeem |
not good, i thought there was a capacitor because that fielsd looks like there was something soldered. what should i check for not displaying LCD ? |
1 Attachment(s) Quote:
Rashid Ahmed Nadeem |
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? |
v 4200 is also different , its true , its did not match with other models Rashid Ahmed Nadeem |
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