Jumper Ezbook 3 Pro-dead, power light and screen don't work,charging light work

Jumper Ezbook 3 Pro-dead, power light and screen don't work,charging light work

TechTablets Forums Jumper Discussion EZBook series Jumper Ezbook 3 Pro-dead, power light and screen don't work,charging light work

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  • #150072
    Rac4
    Participant
    • Posts: 12

    Hi Everyone,

    I was performing a few readings on my EZbook 3 pro battery, because of the frequent battery problem a lot of Jumper buyers seem to get. The power adapter was plugged in, the battery was plugged in and the computer was running. I was taking a voltage reading at the battery connector of the motherboard, I accidently created a short circuit with my multimeter reading sticks and everything shut down. The spark lasted for less than a second but it was enough. I cannot boot my computer anymore, it is dead.

    I tried to power it back but no success. When I plug the power adapter, the side red charging led goes on and off repeatedly. Then, when I press power once, nothing happens : black screen. When I press power a second time, the blue led in front of the keyboard light up for a fraction of a second and then turn off. Nothing happens after that.

    I own a Jumper EZbook 3 Pro. 6gb of ram. Emmc 64gb. I don’t think I have the V4 since I can’t (and didn’t) play with the BIOS (it is locked).

     

    Here’s what I tried so far:

    – I disconnected the battery and the power adapter for a whole night, in order to reset the BIOS. It didn’t work.

    – I hold the power button for more than 30 seconds, then release it for 5 seconds, then press the power button for another 5 seconds. It does exactly what it did before : when I press power a second time, the blue led in front of the keyboard light up for a second and then turn off.

    – I tested the power adapter. It still delivers a 12.20V tension and amps (I was able to light up a bunch of 12V leds (2.5A consumption)).

    – I took no chance and tried with a different 12V (3A) power adapter. It didn’t work.

    – I took a good look at the motherboard and nothing seems cooked.

    – I unsoldered the battery plug from the battery. I created a 8.7V power adapter and soldered it to the battery plug and plugged it in the battery input of the motherboard. It didn’t work.

     

    Does anyone have any clue about what I should try to make it works?

     

    Many thanks!

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    #151777
    Vassilis
    Participant
    • Posts: 27

    AfuEfix64.efi jumper.rom /P /B /N /reboot

    I run this command and my YEPO is dead

    Help meeee

    is there anything to do to recover bios?

    #181921
    Sergey N.
    Participant
    • Posts: 3

    Hello there guys!!
    I do have the similar problem with my Jumber EzBook 3 Pro rev2.
    I eman it doesn’t turn on, battery doesn’t charge up too.
    When I plug in the power supply orange led just start to blink after ever 3-5 seconds.
    When I try to turn laptop on, the blue led just blinking and nothing happens. Same with battery connected or disconnected.
    Power supply is 100 percent workable. I do not understand what is going on.
    Sorry if my English is not that good.
    And I would be very grateful for any hints or advices.
    So far I tried to de-attach battery, connect laptop to my TV, reconnected all connectors.
    What else can I do?

    #181922
    Sergey N.
    Participant
    • Posts: 3

    Does anyone have any clue about what I should try to make it works?

    Hello! I have an exactly the same problem right now with the same symptoms

    Have you managed to fix your jumper?

    #181947
    Juan
    Participant
    • Posts: 1

    Hello,

    @Rac4

    I own a Jumper EZbook 3 Pro. 6gb of ram. Emmc 64gb. I don’t think I have the V4 since I can’t (and didn’t) play with the BIOS (it is locked).

    Here’s what I tried so far:

    – I disconnected the battery and the power adapter for a whole night, in order to reset the BIOS. It didn’t work.

    – I hold the power button for more than 30 seconds, then release it for 5 seconds, then press the power button for another 5 seconds. It does exactly what it did before: when I press power a second time, the blue led in front of the keyboard light up for a second and then turn off.

    I have the same model and I tried the same as above and not a success.

    Somebody suggested in one of these threads to disconnect also the Keyboard to reset the BIOS but I don’t know how to do it, really which is the right connector as I follow the instructions on the thread to the letter.

    Can anybody please show how to do it safely?. I think it is my last resort to find the solution.

    Cheers

    Juan

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