FUJITSU LIFEBOOK A553/G no backlight

[vlademee]

the problem is no backlight, I already try a new lcd but still no backlight, can anyone help me for this problem.

[mon2]

Re: FUJITSU LIFEBOOK A553/G no backlight

Have not searched for the schematic yet but is one available?

Review the voltages on the lcd connector. There should be a backlight voltage pin driven by a boost voltage circuit. This circuit will have an enable pin. Confirm the voltage on each boost circuit region.

[Sephir0th]

Re: FUJITSU LIFEBOOK A553/G no backlight

A good start would be to know whether the main power rail is present at the display connector. So look for 19(?) Volt. If this voltage is missing should be easy to solve from there.
Share clear picture of the connector on the board if in trouble.

[Duranitron]

Re: FUJITSU LIFEBOOK A553/G no backlight

check all the components in the lvds region. maybe a blown fusible resistor. be careful always disconnect the battery every time you connect the lvds cable or an lcd screen. gud luck