Wipro iValue Deem Display
Posted: Thu Dec 29, 2016 1:02 pm
Case Study
Wipro iValue
Model Nmae: WNBOUHH4700KA
Prob: Deem Display
Someone try it before doing by Reflow HM Chip and BIOS. but Can't
Because it has no Schematic diagram on internet.
My steps :: 1st check by 2 different LED display. but Same
2nd Checked all voltage near LVDS connector
turn over the board and check LVDS supplies and found that 19V missing on there.
3rd Check Q26 that no 19 volt from Drain to Source.
finally I found that B22 was burned in 19V line.
Sol: Replace it and problem solv.
Wipro iValue
Model Nmae: WNBOUHH4700KA
Prob: Deem Display
Someone try it before doing by Reflow HM Chip and BIOS. but Can't
Because it has no Schematic diagram on internet.
My steps :: 1st check by 2 different LED display. but Same
2nd Checked all voltage near LVDS connector
turn over the board and check LVDS supplies and found that 19V missing on there.
3rd Check Q26 that no 19 volt from Drain to Source.
finally I found that B22 was burned in 19V line.
Sol: Replace it and problem solv.