The way to solve cn900 auto key programmer black and white screen

CN900 key programmer is orignial transponder key copy machine. CN900 support directly copy 4C and 4D chips. CN900 chip key copy machine equiped with 3.6-inch TFT LCD display and touch screen.

CN900 key programmer CN900 chip key copy machine


If CN900 key programmer screen became black and white. Please follow these steps below:

Step 1: First connect CN900 with computer and power by USB wire

Step 2: First go to CN900 official website: www.cn900.net and download : CN900_LOADER V3.10

Then decompressing file and save it

 

Step 3: Click   . Then will appear follow

picture: You will see in front of Fast there marked hook

 

Step4: Remove the Hook in front of Fast.

Step 5: After remove the Hook in front of Fast then press Update button. After then CN900 and update with computer together

Step 6: After CN900 finished update with computer then will recover as follow:

Remark 1?If update one time the CN900 key programmer still not recover then try as above ways again and again till it recover.

Remakr 2:If during update CN900 and appear a window which need you choose COM port. Then you need to choose a correct COM port. If you do not know which is correct COM port then operate as follow steps:

First right click my computer and choose property

And then choose Hardware.

And then choose device manager

And then find port?COM ? LPT?and click + then will see follow ports

And then take CN900 USB wire out from computer then check the port ?COM  and LPT?again: Checking the difference between connect with CN900 USB wire with computer and take out CN900 USB wire from Computer:

 

Notice?When choose COM port not must be . Different computer have different case. It depend on that when you connect CN900 USB wire with computer and take out USB wire from computer which port ( COM) appear and disappear therefore that port (COM ) you need to choose.