Yiynova LCD Monitor Tablet Repair

[NeroSar]

Howdy, folks, I just created an account for this site, and hoped maybe I could get some help on a little project of mine.

My brother does digital art for money and his tablet broke recently. He got a new one, and was throwing away the old one, but, as I do with many things, I generally like to open them up and see how they work and maybe try to fix them. However, of course I have very little experience or knowledge on how these sort of things work, so maybe I could get some help on here. Thanks in advance. Here are the details:

Model: MSP19 (maybe MSP19U? Not sure.)

Brand: Yiynova

Fault Details: When plugged in to mains electricity, no response, no power led, no amount of pressing, holding or double pressing power button gets any response.

Fault History: Tablet originally flickered wildly and brightly for periods when turned on, then functioned as intended. Then would no longer have anything on the screen (black, blank screen, I believe, this is all second hand hear-say from my brother.) But power LED was still lighted. When I received the tablet, the response was the same, blank screen, but the power LED wasn't functioning either.

Actions taken: I opened up the casing, and fiddled with many screws and tightened several ribbon flexi-cables, hoping that it was just a loose cable or something. This got no response, though I believe -something- small and plastic fell off of the circuit board at the bottom of the tablet casing. Could be important?

My guess?: The screen has no marks or signs of -any- significant wear or tear. No frayed ribbon cables. I'm supposing that the circuit board is fried? Again, I don't know really anything about all this.

So that's that. I would really, really love to have this tablet for myself, and if anyone could help me fix it, I would be super appreciative. Any help, tips, ideas, or solutions greatly anticipated. <3

 

[NeroSar]

Still waiting for help on this. Anyone?

Thanks.

 

[KrisBlueNZ]

That's a good description of the problem, but I doubt anyone here would take a guess based on it :-(

 

[(*steve*)]

I would be thinking backlight problems and a subsequent battery failure. Does it have any indication that the internal battery is charging if you plug it in to its charger?

 

[NeroSar]

I see absolutely nothing change when I plug in the charger. I've fiddled with every cord and tried tightening them, but when I was I was stupid enough to tap some metal to a part of the circuit board, which sparked. Feeling really clumsy, haha. I'm not sure if that's helpful at all, but that's literally the only indication of any life or current I've seen from the anything inside.

 

[NeroSar]

Would pictures be helpful in this situation? I can take some if it might be of use.

 

[(*steve*)]

I see absolutely nothing change when I plug in the charger.

Not infrequently charging is under the control of the processor, so it's possible that if the processor isn't starting that charging is either not happening or the charging indication LED (or whatever it has) is not turned on.

but when I was I was stupid enough to tap some metal to a part of the circuit board, which sparked.

That's generally a bad thing. It's quite possible that this would have further damaged the unit.

But that's literally the only indication of any life or current I've seen from the anything inside.

I'd be googling for the key combinations to do a hard reset of the device. Also, if possible I'd be checking to see if there's any charge on the battery, whether the battery voltage changes when the charger is plugged in, and if any current is drawn from the charger.

It's probably not looking good, but photos *may* help.

 

[NeroSar]

Yeah, I really kicked myself for making it spark like that. Think I was moving a screw driver and I just wasn't being very careful, and I hadn't unplugged the unit. Not smart, I know. Here's hoping it's not totally toasted the unit, if it wasn't already.

I'll google a key combination for hard resetting, I had no idea that was possible. As for checking charge on the battery and voltage changes, how do I go about checking those?
Also, I'll post pictures next chance I get, for what little help they might be..

Very much appreciative of the help.

 

[NeroSar]

Having trouble finding hard reset combination. Any ideas?

 

[NeroSar]

Anymore assistance with this?