Acer 2428 No LCD BackLight

[gps31]

Acer 2428 Working well in external monitor but in lcd only dull display (No backlight)

1. Inverter board changed - No Change


As per Schematic in Page no 13

Inverter Pin

1. Vin 19V
2. Vin 19V
3. PWM 3.32V
4. BLON 0V
5. GND
6. GND

In Motherboard LCD1

Pin 33 --> 3.32V (Brightness)
Pin 34 --> 0V (FPBACK)

IN KB3910 ( U44 )

Pin 24 --> 0V (FPBACK)
Pin 33 --> 3.32V (Brightness)

Pls advice

[tata123]

Re: Acer 2428 No LCD BackLight

these old acer notebooks could also a damge CCFL backlight!!

If you have check another ccfl...

[LP_tekh]

Re: Acer 2428 No LCD BackLight

Look for fuse, may be is bad or bad ccfl like tata123 said.