e5-471 no power

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  • p7comuter
    Senior Member
    • Mar 2015
    • 68
    • Philippines
    #21
    Re: e5-471 no power

    Hello guys i have an update,i already trace shorted components.
    +3v rail is now ok,but still wont power
    Rsmrst no response always at 0v...any suggestion pls help
    Sio replacement is my last option but i wanna make sure before i
    Desolder sio chip. How do i know pls any idea?
    How do i know if it8587 chip is bad?
    Last edited by p7comuter; 03-07-2018, 08:50 AM.

      Comment

      • meritosari
        Senior Member
        • Oct 2010
        • 774
        • Indonesia
        #22
        Re: e5-471 no power

        RTC_RST# and SRTC_RST# get right voltages?

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          • p7comuter
            Senior Member
            • Mar 2015
            • 68
            • Philippines
            #23
            Re: e5-471 no power

            Tnx,will update tommorow. What else do i check meritosari

              Comment

              • meritosari
                Senior Member
                • Oct 2010
                • 774
                • Indonesia
                #24
                Re: e5-471 no power

                Found more than 2pcs board with RTC problem on this series, ( Sometimes D17 blown too)
                Also Check RTC_RST# have more 20Kohm resistance to GND. Hope is approx Mohm value.
                if RTC_RST# only 20K, may be hard to fix, till replace SoC.

                Good luck!

                  Comment

                  • p7comuter
                    Senior Member
                    • Mar 2015
                    • 68
                    • Philippines
                    #25
                    Re: e5-471 no power

                    update: problem solve!!! thank you guys for support..at the spi bios section i put some jumper at R103,R489,R417,R145,R146..i think i accidentally remove the 2 resistor when i try to remove bios chip thats why my charging light has gone.and think my main problem is shorted caps at +3v rail. thank you guyss
                    take note guys this board has no always on voltages at bios chip,,if you found voltage before switch it will not power up and will give 0v rsmrst,try to replace resistor or make a jumper..
                    Attached Files
                    Last edited by p7comuter; 03-13-2018, 02:41 AM.

                      Comment

                      • SACR
                        Member
                        • Jul 2019
                        • 30
                        • Malaysia
                        #26
                        Re: e5-471 no power

                        Originally posted by JaroTech
                        Here are the schematics.
                        Thank You for this Schematic 👍

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