After much torment, I still revived the tablet, the first time I took it apart (disassembling the tablet is very simple, unscrewed the screws from the bottom around the perimeter and the sharpened credit card went in a circle between the black frame and the gray side of the tablet, everything opened very easily) I didn’t have a multimeter, I thought * to push the battery * but since it charged through the controller, of course this did not happen, as a result I took a multimeter to measure the voltage on the controller 0, it was decided to open the battery and charge the battery directly, who will have a deep discharge and who it is oh, my information couldn’t help, the battery is bolted to the tablet with 3 screws, unscrewing the screws and disconnecting the cables, I removed the battery, carefully peeled the sticker off the controller on both sides and fixed it with tape, the controller is inserted into a plastic frame, be extremely careful and slightly lower it down the controller so that the contacts on it are visible, two banks are soldered sequentially along the edges of the necessary contacts with the signatures B + and B- (in the middle two contacts are not needed) took an old charge for the phone at 1 amp and took the wires to + and -, prepared a multimeter on the wave I turned on the power, and connected it in series from charging - and then + held it for 1 second, letting it go for 10 seconds, then I checked the voltage with a multimeter and gradually the battery started to come to life (then my girlfriend helped me to do this so that the process goes faster, a hint that help will not be superfluous) brought the battery to 4.8 V, immediately quickly stuck the sticker back and connected the power cable and put it on charge, you can’t hesitate because the battery loses its charge very quickly, after everything went on, only the red LED turned on and charging went on, checked with a multimeter output from the controller was 7.4 volts, left to charge for half an hour, then quickly gathered the plate and put it on charging has finally, after the plate was turned on as if nothing had happened!
Thanks to those who were not indifferent to my problem! I hope this post will help if, nevertheless, something happens to someone!
One of the options for how this happened, maybe at the customs they checked what was inside and turned on the tablet but forgot to turn it off and it went into a deep discharge.
Post has been editedAnton Neki - 12.09.18, 21:59