Function trouble
（
VGA
）
VGA no picture
Check if the pin 13
、
14 of
CN15 have the signal?
N
Y
N
Y
Check if the pin1
、
2
、
3
Check peripheral
of CN15 has signal?
Y
N
video equipment
Check the circuit
1.Check the power
supply of the U12
between CN15 and U12
2. U12 is damaged
3. Updata the software
10
.
11
.
MANI
BOARD
FAULT
JUDGMENT
13
Function t r ouble
（
HDMI
）
HDMI no picture/sound
Check if the pin 19 of
CN14 is LOW?
OR PIN 15,16 of CN14 has I2C
SIGNAL?
N
Y
N
Y
Check if the pin10
、
12
Check U9
、
U1
of CN14 has signal?
N
Y
Check peripheral
1.Check the power
supply of the U12
video equipment
2. U12 is damaged
3
.
Updata the software
