Okay. I have an older Compaq Presario F700 and when it's turned on the screen does not light up. The computer seems to stall at the BIOS hardware check. I have removed the memory and the motherboard complains at me because it can't find any memory. I have removed the hard drive and nothing changes. I have tried connecting the laptop to a known working CRT monitor with a D sub connector and still get zero video. I was at first thinking that the screen's back light may be burnt, but now that I found and tried the D sub connection I'm thinking there may be bigger problems. Unless somebody is gonna tell me the CRT will not display the motherboard POST messages then I'm thinking that the motherboard needs to be replaced, or the screen and its power inverter need to be replaced. I would appreciate any comments.