My hfs20 will power up but the display screen remains black

it sounds like the motherboard has blown

Hi
What do you mean by the laptop screen is remaining?
Does the screen stay black without any display?
Could you explain more about the problem?

Either the display panel needs to be replaced or the video inverter is bad.

First place to chaeck will be power supply, the problem can also be caused by bad inverter circuits, bad lamps, see example of failed monitors due to bad caps, lamps, http://s807.photobucket.com/home/budm/allalbums
Post back what you see inside so we can guide you further.

Analysis procedure on this one is straightforward, though equipment intensive.
1) Put a different display on the Mac and see if it works better.
2) Put a different computer on the display and see if it works better.
Until you do this, we don't even know what component is at fault. Once we do, you can proceed from there.

Remove the memory from your unit - power it up it should beep if full communication is still happening across your m/board. No beeps you board has died. if it beeps and your using two diffent memory modules just fitt one leave the battery out and power it up = if no display pull power swap out the memory and try again. if display occurrs you have a defective memory module - throw that failed unit away

glenn

Black uses much less power. It's a device for automation, so you really should not lavish the watts and attention on it unless it has to perform something truly novel.

If you really want to use the monitor though, you can use the function-key combination used to switch the display between internal and external displays.

Do you have images on the card?

this is normally motherboard or powe side problem check your motherboard