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    Dell Precision 7720 Bios bricked need help repairing dump

    Discussion in 'Dell' started by code9523, Jan 18, 2019.

  1. code9523

    code9523 Notebook Enthusiast

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    Hello!

    I have a dell precision 7720 it failed bios update and now after i press power button laptop shuts down after 5 seconds.
    I have read the chip by a programmer and i have 16mb dump.
    Please help me to repair it.

    Thank You!
     
    code9523, Jan 18, 2019
    #1
  2. custom90gt

    custom90gt Doc Mod Super Moderator

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    Silly question, did you try the stock Dell bios recovery?

    You can see steps here on Dell's site.

    Or you can try holding down the power button for 30 seconds and that should start the bios recovery process.
     
    custom90gt, Jan 18, 2019
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  3. code9523

    code9523 Notebook Enthusiast

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    I tried but it doesn't do anything only powers on for couple seconds and shuts off doesn't matter how long I will hold power button screen is dark with no picture or backlight.
     
    code9523, Jan 18, 2019
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  4. Vasudev

    Vasudev Notebook Nobel Laureate

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    You need to create a USB key using the steps mentioned here, otherwise the dell pc won't boot up.
     
    Last edited by a moderator: Jan 18, 2019
    Vasudev, Jan 18, 2019
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  5. Vasudev

    Vasudev Notebook Nobel Laureate

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    Follow the steps that c69k has written otherwise the PC won't go into recovery mode. I've put the link in above post.
     
    Vasudev, Jan 18, 2019
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  6. code9523

    code9523 Notebook Enthusiast

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    The link is not working but if you mean to create a recovery usb I tried it already and it will not turn on anyway.
     
    code9523, Jan 18, 2019
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  7. custom90gt

    custom90gt Doc Mod Super Moderator

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    I fixed the link for him.
     
    custom90gt, Jan 18, 2019
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  8. code9523

    code9523 Notebook Enthusiast

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    I tried that either and from dell site but no luck in my case. The recovery procedure won't start at all. I checked the motherboard it has all voltages needed to work. No shorts found. It's only firmware based issue.
     
    code9523, Jan 18, 2019
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  9. custom90gt

    custom90gt Doc Mod Super Moderator

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    Does it attempt to boot up with the ctrl+escape?
     
    custom90gt, Jan 18, 2019
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  10. code9523

    code9523 Notebook Enthusiast

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    It behaves same as i just press power button. It turns on for a second there is an hdd activity led blinking and power led solid on and than it turns off. If i will unplug ram it will blink an error code for 2 ember and 5 white blinks. but no post or backlight of lcd.
     
    code9523, Jan 18, 2019
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  11. Vasudev

    Vasudev Notebook Nobel Laureate

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    I reckon you did format the usb drive as fat16 and copied only few dell files and then only the hdr file, correct?
     
    Vasudev, Jan 18, 2019
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  12. code9523

    code9523 Notebook Enthusiast

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    Guys! The problem is solved! I found a site with dumps etc http://schematic.vn/ just need to subscribe there for 12$ and the admin will fix your bricked bios dump. This is not an advertising just my experience! The laptop booted fine but after couple attempts.
     
    code9523, Jan 18, 2019
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  13. Vasudev

    Vasudev Notebook Nobel Laureate

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    Go into BIOS options and check if BIOS Flashback tech or BIOS recovery is enabled or not? I think it was disabled. Usually on most business laptops and workstation they are disabled to prevent downgrades.
     
    Vasudev, Jan 19, 2019
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  14. kaibsora

    kaibsora Notebook Consultant

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    they even had what i need for my 7710! woohoo!!
     
    kaibsora, Jul 31, 2019
    #14