Acer Aspire E1-772G wont turn on, won’t power on, no display, black screen problems

Laptop Acer Aspire E1-772G won’t turn on, won’t power on, there is no display, just a black screen. This is a general diagnostic and repair steps to fix those problems.

Troubleshooting laptop Acer Aspire E1-772G won’t boot, won’t power on, no display just black screen

When you push on the Power Button the Power led lights ON or NOT, your Acer Aspire E1-772G won’t start up, and there is no display just a black screen. Possible problem and the fixes steps:

Battery has no charge left + AC adapter failed; you press the power button on laptop Acer Aspire E1-772G nothing happens, laptop won’t turns on and there is no display, the battery has no charge left, the motherboard doesn’t receive any power, laptop cannot turn on. You plug in the AC adapter but that doesn’t help, your laptop Acer Aspire E1-772G still won’t power on, there is a chance you have failed AC adapter. In this case try with another charger or check AC adapter with a Multimeter. If it’s dead, replaced with a new one, (How to check AC adapter with Multimeter).

Power circuit in wrong state or Over volt protection trips; you press the power button but nothing happens, laptop Acer Aspire E1-772G won’t turns on and there is no display just a black screen, your laptop has static electric charge made power circuit in wrong state. Unplug AC adapter, take out the battery and hold down power button for 30 seconds, the static charge will dissipate. Plug in the AC Adapter and turn on your laptop Acer Aspire E1-772G. This should restore the system to normal operating mode.

Screen faulty or bad video cable connection; laptop Acer Aspire E1-772G turns on, but screen is black, with Power led lights ON. Test the laptop with an external monitor connected to the HDMI port, VGA port or any Display port, press the appropriate key to switch to it. If the external monitor works fine and load the operation system, most likely you have a faulty screen or bad video cable connection. Check them and replace the faulty one.

Power button failed; the charge led lights on when you plug in the AC adapter, but laptop won’t turn on when you press the power button. Probably you have a Power button failure. The Acer Aspire E1-772G Power button has to be repaired or replaced; you can short the power button borne with conductor wire to see if laptop turns on, (How to Test Power Button).

Hardware failure; the laptop powers on, but there is no display just black screen with Power led lights ON or your laptop Acer Aspire E1-772G stock on logo or restart. In this case, it’s possible one of the Hardware failed. You can try to disassemble the laptop to bare minimum and try to reseat the hardware one by one and power on the laptop every time you reseat a hardware to know the failed one, replace the faulty hardware,

Some electronics components or chipset on the motherboard failed; Laptop Acer Aspire E1-772G won’t turn on at all. Disassemble the laptop and take out the motherboard. With a Multimeter check electronics components continuity, Voltage and Chipset temperature, you will need an electronic Schematic Diagram for Laptop Acer Aspire E1-772G. The failed electronic component has to be replaced, (How to test Laptop Power System). (Electronics components failure will be updated every time we fix this laptop)

BIOS failed; Laptop Acer Aspire E1-772G won’t turn on at all, if the Power System and electronics components on the motherboard are good, there is chance you have failed BIOS, reprogram or replace the BIOS chip (How to reprogram (Flash). Laptop BIOS).

Motherboard dead; The Acer Aspire E1-772G motherboard has to be replaced.

For other Acer Aspire E1-772G problems write a comment.

10 thoughts on “Acer Aspire E1-772G wont turn on, won’t power on, no display, black screen problems

  1. store

    I hope you can help me with my problem. I have acer aspire E1-772g Not powering on and not charging,
    When (AC is plugged in)and I press the power button It turns on for 1 sec then shuts off and stays that way.
    -. If I put battery on, then no charger led lights –> No charging (battery checked on another machine and its fine)
    -. CMOS battery holder cracked so no CMOS battery is installed onboard

  2. store

    I took some multimeter reading on the board to get me going here are they:
    BQ735 Charger IC has the following voltages:

    NO BATTERY ONLY AC POWER
    -20 VCC – 18,7V
    -19 PHASE – 2,4V
    -18 HIDRV – 2,4V
    -17 BTST – 5,8V
    -16 REGN – 5,95V
    -15 LODRV – –
    -14 GND1 – –
    -13 SRP – 2,4V
    -12 SRN – 2,4V
    -11 BATDRV – 0v
    -10 ILIM – 3,12V
    -9 SCL – 3,3V
    -8 SDA – 3,3V
    -7 IOUT – 0-0,3V moving
    -6 ACDET – 2,65V
    -5 ACOK – 3,12V
    -4 ACDRV – 24,8V
    -3 CMSRC – 19V
    -2 ACP – 19,5V
    -1 ACN – 19,5V

    If battery and AC is connected, then the readings are the same except everyy 2,4V becomes 1,9V
    MY first guess is that Charger IC needs replacement, but is that explains the 1 second power shutoff?
    Could you help me what could be the problem? I’m not a pro more like a enthusiastic beginner

  3. helppard

    Charge pump output to drive both adapter input n-channel MOSFET (ACFET) and reverse blocking n-channel MOSFET
    (RBFET). ACDRV voltage is 6V above CMSRC when voltage on ACDET pin is between 2.4V to 3.15V, voltage on VCC
    pin is above UVLO and voltage on VCC pin is 275mV above voltage on SRN pin so that ACFET and RBFET can be
    turned on to power the system by AC adapter. Place a 4kΩ resistor from ACDRV to the gate of ACFET and RBFET
    limits the in-rush current on ACDRV pin.

    So ACDRV=CMSRC+6=~25V

  4. store

    I’ve measured MOSFETS: Q8804 seems fine (Pin5-8 gives 19V, gate gives 2,4V from HIDRV, pin 1-3 gives out 2,4V)
    Also did remesured BQ735 ic and noticed BATDRV gives 0.03V.
    When I plug in only the 10,5V battery, the Q8804 MOSFET pin 1-4 all the same 10,5V and pin 5-8 is 0V. When I plug in ac adapter and battery together then pin 1-4 stays 10,5V BUT pin 5-8 18,5v but no charging led light
    T9201 measure is 3.1v that is probably why it shuts off instantly on turning on. so FORCE_OFF
    T9208 is only 0.4-2.6v so too low “VRM_PWRGD” is NOT GOOD
    U8000 VIN is 19,6v
    99.9% that I have the guilty GUY in under my digital magnifier.
    R9204 seems to be busted so 0V coming to ALL_SYSTEM_PRWGD that is need to not FORCE_OFF system on Power button Press. I order a new 100kOhm resistor and lets see what happens.

  5. helppard

    Couple time face intermittent problems mostly was related with resistor, but to find that ones should be always spending lot the time and frustrated.

    Especially to trouble shooting a motherboard after “power switch on” (secondary power systems), many lot components which can be the cause.

    Good Job!

  6. store

    Found a Datasheet for a similar ISL95813 chip (http://www.datasheetspdf.com/PDF/ISL95813/730950/1)
    Here are my readings:
    – VRM_ON: 3.3V
    – VRM_PWRGD: 0.5-1.3V
    – NTC: 2.2V when off and 3.3V when POWER button pressed
    – VR_HOT: 1.8-2.0V
    – VIN: 19.6V
    – VDDP: 5V
    – PWM3: 5V
    – VDD: 4.3V
    According to Datasheet:
    When temperature rises, then the NTC pin voltage drops. TZONE
    value changes accordingly. but TZONE says when Voltage>1.2V then Tmax<76 Celsius that is correct, so VR_HOT is not lowered below 0.8v.
    I a'm correct then Temperature is normal, and its got voltage.

  7. helppard

    VRM_PWRGD should be 3.3V is CPU VCore (+VCORE) is OK (ie. around 1.8V for Haswell).
    VRM_PWRGD will be low if CPU VCore is not present.

    VRM_HOT# will go low (below 1V) in case of overload/over temperature situation which is not the case here.

  8. store

    Thanks for the confirmation about VR_HOT.

    I will check +VCORE once I replaced the ground resistor =(2.2hm) that I accidentaly blown

  9. store

    Found out that Q8003 shorted so replaced it, orginal symptom is back.
    While I was there It seems I found that the real problem is that most of the VRM chip is shorted to ground. The following pins are all shorted to ground:
    VRM_LG1
    VRM_LX1
    VRM_HG2
    VRM_LX2
    VRM_RTN
    Since I can’t found detailed datasheet for ISL95812HRTZ I’m guessing this is a problem!
    Am I correct to think that my VRM chip should be replaced??

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