Have i killed the Laptop

[steven crilly]

Ordered an EzBook 3 Pro months ago, took 2 months to arrive from gearbest but i was OK as the price was good and was only for a nice looking light use laptop. Was looking for a new power supply after it arrived as the short cable and non UK plug was a pain, and realised i had an old interchangeable tip on that was the same rating. Plugged it in then immediately, 2 seconds at most, realised i had the polarity reversed and removed it. The laptop seemed to be fine but i noticed that when disconnected the charging light was lit and the battery indicator showed it was charging, though the percentage was going down. Plugged in the original charger but it wouldn’t charge. now the battery has hit 0% and the laptop wont turn on.

I know new laptops normally have circuit protection to mean that the wrong polarity will blow a charging fuse or something else with little to no long term damage but ‘ think the cheap EzBook has this. I have had it apart and inspected the board and saw no signs of damage (though i did see that there is a ribbon connector labelled for a finger print sensor lol)

Have a wrecked this laptop?

Thanks

 

[Giovanni]

Could you post an high-res photo of the motherboard?

EZbook 3 Pro BIOS modder - find my work here
If you want to tag me, my username is thegiolly

[steven crilly]

Tried to attach these images a few times but it just timed out.

Here is the best picture i can get, sorry its a bit fuzzy as the lighting is poor. No sign of any damage or blackening to surface components and the traces seem fine, from what I can see.

https://drive.google.com/open?id=1nyr2Q1R9XEBAm86YF98d-sjAMEaQ4jKOBQ

https://drive.google.com/open?id=16wQCpF56dAYmVNPlzl83JjCZqAtaviTAnQ

https://drive.google.com/open?id=1J5eDHgA3iTNEPSmjV9ecSmAnut32TL2tGg

Thanks

[Lee Davison]

Is it possible that the charger took the damage or fused out? Can you pop a multimeter across the pins and see if it’s still alive? Diagnosing this on a board level might be impossible. Sometimes components don’t fail in a visible way 🙁

 

[steven crilly]

I’m in work so don’t have access to my multi meter unfortunately, but i did find an old device that has the same requirements an nearly the same size barrel, I used the Jumper power supply and it powered up so looks like its the laptop.

Thanks for coming back so quickly

[Giovanni]

A bit of reverse engeneering of the PCB is needed but from a photo it’s nearly impossible.
Anyway, don’t trow the laptop away.. If you only fried the charging circuit you could use an external circuit to charge the battery or put a power supply in place of the battery itself.

EZbook 3 Pro BIOS modder - find my work here
If you want to tag me, my username is thegiolly

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