Dell Inspiron 17R SE 7720 wont turn on, won’t power on, no display, black screen problems

Laptop Dell Inspiron 17R SE 7720 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 Dell Inspiron 17R SE 7720 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 Dell Inspiron 17R SE 7720 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 Dell Inspiron 17R SE 7720 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 Dell Inspiron 17R SE 7720 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.

Power circuit in wrong state or Over volt protection trips; you press the power button but nothing happens, laptop Dell Inspiron 17R SE 7720 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 Dell Inspiron 17R SE 7720. This should restore the system to normal operating mode.

Hardware failure; the laptop powers on, but there is no display just black screen with Power led lights ON or your laptop Dell Inspiron 17R SE 7720 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.

Screen faulty or bad video cable connection; laptop Dell Inspiron 17R SE 7720 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, 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.

BIOS failed; Laptop Dell Inspiron 17R SE 7720 won’t turn on at all, if the voltage 19V, 3.3V, 5V OK  and electronics components on the motherboard are good, there is chance you have failed BIOS. There is a signal test confirmation on EC/SIO pin name RSMRST# . This pin must available 3.3V(tolerance 10%) than Bios Confirmed OK. If the test failed reprogram or replace the BIOS chip.

Laptop Power System has problem: Laptop Dell Inspiron 17R SE 7720 won’t turn on at all, probably some electronics components or chipset on the motherboard failed;  Disassemble the laptop and take out the motherboard. Ceck No burnt marks visible on the mainboard. Check chepset temperature (CPU,  GPU, Power-Supply IC …). Check power jack. Check motherboard receives 19V. with a Multimeter measure voltages on coils, check for any components shorted to ground.  checked 3.3v/5v is up and running?

If you  have 3VALW And 5VALW at coil. 3VALW should go to sio and from there you should get 3v at power button. Check SIO for corrosion,shorting or any componenets which looks suspect. Check 3 & 5v SUS voltage.

Will need an electronic boardview or Schematic Diagram for Laptop Dell Inspiron 17R SE 7720. The failed electronic component has to be replaced.

Note: (In the comments we will be updated electronics components failure).

Motherboard dead; The Dell Inspiron 17R SE 7720 motherboard has to be replaced.

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For other Dell Inspiron 17R SE 7720 problems check the comments or write a comment.

6 thoughts on “Dell Inspiron 17R SE 7720 wont turn on, won’t power on, no display, black screen problems

  1. ali

    Hello,
    My Inspiron 17R 7720 SE laptop can’t power on with battery but only AC adapter can turn it on, if i try to charge battery with power off laptop than it flashing 4 orange flashes, then white flash, then repeat, if i open laptop connected with AC adapter with battery it showing a start-up message “Your battery is temporarily disabled. Please turn off the unit and try again when the unit is back to operational temperature” & keep flashing 4 orange flashes, then white flash, then repeat.
    When I run the F2 Setup, under battery health I get the same message above “Your battery is temporarily disabled. Please turn off the unit and try again when the unit is back to operational temperature”

    The computer operates normally with the AC adapter, shows the battery at 100% charged, but shuts off immediately when the AC adapter is disconnected.

    Now i google my issue & found it may be issue with my battery or AC adapter so i bought one by one new AC adapter & battery but no success, still same error as above and it only can power on with AC adapter, hence I wast money to bought new AC adapter & battery, now after all this i been suggest on Dell website that issue is with laptop mother board, and need to replace/repair motherboard Charging IC or some other part,
    Now i am wondering how i check whether issue is in motherboard Charging IC or some other part, i am ready to work on my laptop motherboard, any suggestion will be highly appreciated, since i am newbie and need expert help to check mother board on component level,
    Thanks.

  2. ali

    yes i did, included upgrade & downgrade bios as well, nothing working, so i am 99.9% sure this issue is from hardware but not software,
    any suggestion will be appreciated,
    Thanks.

  3. Solved Problem

    Dell Inspiron 17R 7720 SE laptop can’t power on with battery but only AC adapter can turn it on, if i try to charge battery with power off laptop than it flashing 4 orange flashes, then white flash, then repeat, if i open laptop connected with AC adapter with battery it showing a start-up message “Your battery is temporarily disabled. Please turn off the unit and try again when the unit is back to operational temperature” & keep flashing 4 orange flashes, then white flash, then repeat.
    When I run the F2 Setup, under battery health I get the same message above “Your battery is temporarily disabled. Please turn off the unit and try again when the unit is back to operational temperature”

    The computer operates normally with the AC adapter, shows the battery at 100% charged, but shuts off immediately when the AC adapter is disconnected.

    there is a bad capacitor – PC5 marked on the diagram (near EC58, EC59, EC60 )

    My Inspiron 17R 7720 SE laptop can’t power on with battery but only AC adapter can turn it on

    I removed it, connected the battery.

    My Inspiron 17R 7720 SE laptop can’t power on with battery but only AC adapter can turn it on

    it helped! no more “operational temperature” notification, charging works as expected, anyway
    here’s its location on the board:


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