I am trying to troubleshoot an HP 7140 LCD. The LCD backlights, but
remains completely black. I am able to access the machine using an
external monitor. I have cracked it open and am ready to replace some
parts. I don't want to spend time and money throwing parts at this
box. I am leaning towards a new system board (assuming there is
separate chips for LCD and external video), but do not know enough
about LCD technology to rule out the inverter, LCD, or cable kit.

The machine just went black right in the middle of use and stayed that
way.

Any insight into what should be replaced,or how to troubleshoot to
narrow my search would be greatly appreciated.

Ryan

wrote in news:1164841417.684697.253850
@l12g2000cwl.googlegroups.com:

I am trying to troubleshoot an HP 7140 LCD.

Please describe the unit you are working on. You call it an LCD, but it
sounds more like a laptop PC, but the HP 7140 is listed as an OFFICEJET
Network-Ready Digital Copier, Fax, Scanner & Printer.