M # CM 870, at turn on Compaq logo appears for a second, then no
display. Place a light onto the screen, you can see the info from the
computer. How can the lcd, or lamps be bad, if display comes in for a
second perfectly? Dani.

The inverter is going into a protect shutdown after the initial attempt
to turn on the lamps.
Odds are very good that the inverter has a set of output devices and
transformer for each lamp, but only one driver ic. If there is a
problem in any of the output stages the driver ic shuts down which
turns off all the lamps.

I have found many that used the round surface mount electrolytic
capacitors go bad cause this, a bad tube also cause this, along with
simple open surface mount fuses that appeared to open for no reason.