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Locating Fault on Asus X540SA Rev.2.0 - Power Button Non-Responsive, uP0132p Element Heating Up

najdzik 4530 8
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  • #1 16754602
    najdzik
    Level 16  
    Hello

    I have a small problem in locating the fault on Asus X540SA Rev.2.0
    The disc does not respond to the POWER button

    From what I noticed after connecting to the power supply, the element marked uP0132p warms up and with it the processor gently warms up
    Power consumption ranges from 0.4-0.5A

    Due to the lack of a schema, I have difficulty locating the problem.
    Thanks in advance for your help
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  • #2 16754628
    ul1002

    Level 35  
    Do you have any jumpers behind the coil near this system? How to bend and measure what this inverter gives you but how do I know this crap is one half ST-BY or 3.3V or 5V.
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  • #3 16754635
    najdzik
    Level 16  
    There is one jumper and after its desoldering the system gives 1.85V
    There is no short to ground on the other side
  • #4 16754642
    ul1002

    Level 35  
    Can you take a picture of this place and jumpers?
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  • #5 16754652
    najdzik
    Level 16  
    Locating Fault on Asus X540SA Rev.2.0 - Power Button Non-Responsive, uP0132p Element Heating Up

    I will add that the main converter is working properly
  • #6 16754678
    ul1002

    Level 35  
    That is a mistake. How many inverters does it work? After desoldering the jumper still warms up uP?
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  • #7 16754748
    najdzik
    Level 16  
    After uncracking, the UV is not heating up.
    After connecting the power, all the inverters work, except that on the coil of one, the voltage drops from 0-1,3V
    This is probably a processor converter
  • #8 16754777
    ul1002

    Level 35  
    If the inverter heats up, it is either inefficient or has too much load, 1.8V is a graphic in SOC, see if there is a broken core.
  • #9 16754850
    najdzik
    Level 16  
    The core is OK. I suspected SR29H damage and now I am more convinced about it

    Added after 35 [minutes]:

     Okay now I know for sure that BGA is damaged.
    The system mentioned at the beginning of the uP0132p was overloaded by a damaged BGA chip.
    This system probably powers the graphics section in SR29H
    I leave the repair decision to the owner
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Topic summary

The discussion revolves around troubleshooting a non-responsive power button issue on an Asus X540SA Rev.2.0 laptop. The user notes that the uP0132p component heats up upon power connection, with a power consumption of 0.4-0.5A. Various responses suggest checking jumpers and inverters, with one jumper yielding 1.85V after desoldering. The user confirms that after further testing, the uP0132p does not heat up when the inverter is uncracked, but voltage drops on one coil, indicating a potential issue with the processor converter. Ultimately, the user identifies a damaged BGA chip as the likely cause of the overheating and power issues, which may affect the graphics section.
Summary generated by the language model.
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