Genius PenSketch 9x12, Service Manual

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Figure 5. Diagnose Symptoms
2.3 Analyses of the Problems
Problems Condition Description Probable Reasons Solutions
1. Hardware Not
Recognized
When tablet connects with
computer, LED light is
constantly twinkling. It shows
system is searching hardware
but can’t recognize hardware.
Or hardware is recognized as
Human Interface Device but
not as Tablet Pointing Device
1. Incompatible with
computer system
or hardware
2. PCB defect
3. USB Cable
defect
1. Restart PC or
Reinstall driver
2. Change PCB
3. Change USB
Cable
2. No Response When tablet connects with
computer, the LED doesn’t
come on and system doesn’t
search hardware. 1. PCB defect
2. USB cable defect
1. Change PCB
2. Change or
re-assemble
USB cable
3. No Response Hardware can be recognized
but tablet doesn’t work 1. PCB defect
2. Digital pen
mal-function
1. Change PCB
2. Check digital
pen
4. No LED Light Tablet can work but no LED
light 1. LED defect
2. PCB defect
Change PCB
5. Cursor not be
Positioned and
Jump Away
Randomly
When digital pen move to the
certain area of tablet, the
cursor jumps to another place
of the screen. 1. PCB Defect Change PCB
6. Cursor
Trembling
When digital pen tip closes to
or touches with tablet, the
cursor is trembling and can’t
stop in the certain point. 1. Digital pen low
battery power
2. Digital pen defect
3. GND springs is
1. Change battery
2. Change digital
pen
3. Adjust the
5