I need a schematic and help me on this laptop please acer v5-431p board id: HUSK MB 11309-4M 48.4TU05.04M. LAPTOP has no backlight on the screen, already tried replacing good screen but still the same issue no backlight on the screen. anyone can help me on this please
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acer v5-431p schematic needed
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Re: acer v5-431p schematic needed
need help please someone share a schematic. I found a 5pin chip located on U4901 connected to lvds it has only marking HC36B, and that chip only pin5 have 3.3v the rest 0v and pin2 is groundLast edited by String2016; 04-10-2019, 08:14 AM.
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Re: acer v5-431p schematic needed
Thank you, its similar. so here is i have a missing voltage LCDVDD on Pin39 and pin40 3.3v and capacitor connected to that C4902 have 3.3v and on C4901 no voltage, and on the 5pin chip which is SY6288C6AAC on pin5 have 3.3v which is IN but on pin1 EN and pin3 OUT no 3.3v.anyone can help me on this please what to do next
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Re: acer v5-431p schematic needed
@mulong2019, You can forget about the U4901 malfunction. By jumpering PIN3 & PIn5 u have effectively bypassed that circuit and as a result you are having 3v on pin 39 & 40 of lvds connector.
You need to measure Voltages on PIN38/pin1/pin9/10 and match them with schematics. I assume you are having display but no backlit.
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