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Lenovo G50-70 - power on problem
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Re: Lenovo G50-70 - power on problem
I feel your IT8586E is either not properly soldered, or bad flash or the chip itself is bad. Remember, whatever we order online, these chips are not new(majority case). So i'll suggest before discarding this particular case if you another ite8586, try it once. I had similar problems and ultimately the so called new ite chip was bad. You never know with these cheap chinese stuff....
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Re: Lenovo G50-70 - power on problem
It could be the KBC as suggested by mcplslg123 ,try this before replacing it though,Check everything on ADAPTER_ID_ON# ,PR322 voltage on both pins ,PC1266, PD304, PQ995 if they`re on the board ...Last edited by SMDFlea; 10-21-2018, 04:55 AM.
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Re: Lenovo G50-70 - power on problem
Originally posted by DeniS182 View PostIT8586 is soldered properly, I also mean my problem is in bad flash or chip itself. I need to buy programmer and then try it with other chip.
SMDFlea: these components aren't on board
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Re: Lenovo G50-70 - power on problem
Today I reprogramm KB controller and laptop is now on, but with no picture, only black screen. I don't have voltage on +VGA_CORE, on gates of mosfets also and PIN 8 ENABLE signal on ISL62771HRTZ should be 3.3V? because I have zero here. I attached right schematic for NM-A271.Attached FilesLast edited by DeniS182; 11-15-2018, 05:15 AM.
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Re: Lenovo G50-70 - power on problem
Is PXS_PWREN even coming from PCH? (MCP in schematic DDI, EDP section) There are many places where it goes....Last edited by MJ-meo-dmt; 11-15-2018, 06:20 AM.while alive { live(toFullest=true) }
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Re: Lenovo G50-70 - power on problem
@DeniS182 Uhm... I'm busy here with a HP board giving me random start/not working shit... so my mind is fluttered with shit atm but uhm... Did you make sure that you have the suspected powerup states. See page/sheet 18while alive { live(toFullest=true) }
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