Recently purchased a tablet i-robot with aluminum body, a red LED, camera, charging 9V and 4 GB memory.But unfortunately at the first firmware update unit disconnected from the computer and computer asking reconnect it. Then it not turn on.The one way to enabled it - the close of 29-30 contacts flesh. I tried to restore it by the different program's (RKAndroidBatchUpgrade1.1EN, RKAndroid_ENG, RKAndroidTool, MydroidDevTool_v1.0CN.) but all program's out approximately one message: Start upgrade...Start Download Boot Code... Download Boot Code OK Start Test Device... Test Device Fail Upgrade Fail(( I tried to update firmware on different computers with different cables. It did not help. I began to suspect that somewhere in the hardware failure. The device board installed MD01-V6.0. Although the body of memory chips and processors are not comfortable, but near the processor is the contact pads (presumably for testing or programming) but also to determine where they are connected is very difficult.Is it possible to diagnostic the processor, memory, flash individually, by USB connection?From the available information I have only datasheet on RK28xx. Does anyone have Refer documents "RK28xx USB OTG Controller.pdf" and "RK28xx NAND Flash Controller.pdf"? These documents would help me to check board. Does anybody find electric circuit diagram Apad?Are there any enthusiasts that could help reconstruct the electric circuit?