The use of programmer selftest command,to check if there is problem itself.

Selftest way I:

Step 1 : Input the SELFTEST in the Enter chip printing,click

Step 2 : Click ,look at the hint in the display area,selftest 0 means the test pass;

Step 3 : Install the NO.1 test board and the short port of VGA ISP(short circuit the 4pins and 11pins,12pins and 15pins);

Step 4 : Click ,check the hint in the software,it will hint Selftest 1,test pass;

Step 5 : Install the NO.2 Self Test Board;

Step 6 : Click ,check the hint in the software,it will hint Selftest 2, test pass;

Selftest way II :

Step 1 : When there is no chip on the locking seat,input the type of 25XX in Enter Chip Printing;

Step 2 : Click ,it will hint that there is no chip or the locking seat hasnt been impacted well,which is normal;

If it hints that there may be a pin empty solder;

Attention : In the case of that some users have no test board,as long as the selftest 0 and 25 chip test pass,the machine is normal.

If there is other hints when doing selftest 0,the way to deal with it could be as following:

The problem of connection with computer and the programmer,please step-by examine according to the hint of failure process;

Hardware trouble like pin electric leakage,problems inside the pins,VPP open circuit,GND open circuit,VPP short circuit,VCC short circuit,GND short circuit,VPP protection not shut off,which must be returned to factory to repair.