acer iconia w4-820 series not charging

kraytoz

i got an acer iconia w4... which is now has a charging problem... when press power button you will see on the screen the acer logo and batt icon,,, that need to be charge...i tried it to charge to its original charger nothing happen, its like it didnt appected... tried it to any of mine different charger (3pcs) it doesnt charge,,, but if i use that charger in my cp its all charging,,,, only in acer iconia it wont charge,,,, i think there is something wrong with its hardware,, maybe a fuse is busted,,, try to google it, i cant find anything so i post it here that might someone will help me with this prolem,,,, or can u give a schematic of charging ways of this acer iconia w4,,,, pls help thanks...  

kraytoz

after i got an analog tester from my friend, i open the tab and check the terminal of the battery onboard.. i got 4,4Vdc reading.. remove the batt. 0vdc on the board...read the batt. output out of the board it was 4.4vdc..  insert the USB and read the input on batt terminal without the batt,, it has a 4.2Vdc... its only means that the usb, when inserted to the tab it gives 4.2 vdc to power up or charge the tab... but why still the tab not charging and its like nothing happens???  also i charge the batt outside by using a batt charger for 10hrs now and when insert it to the tab still the same...  

       i already done the 3or4 fingers conbination to reset the tab still i get hang on blank screen or just a logo a few second then offf,, whould someone show me how to reset or reprogram this tab,,, plsss help.. pls some answer....