Connecting Macbook with a compaq MP1400 digital projector

VGA to HDMI cables don't work. They're a con. VGA is an analogue signal. HDMI is digital. It's not possible to convert from one to the other with just a bit of wire.

reset the lamp hours in the on-screen menu.

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That might be because of the weak or bad connection of computer or the projector. Also you should check whether the projector is out of order or not.
http://mhelpdesk.com/field-service-management-software/

you need a cable:
type depends on your macbook pro model and epson:

After connecting the video cable to you laptop (of course), change the display mode of your laptop to "Duplicate" or even "Projector Only" mode by holding the "Fn" key and selecting the display mode key which may be "F8" for you.

Go into projectors inputs and assign it to the correct input. There's multiple choices

Consult the Sharp Manual for VGA specifications and set the Compaq VGA to match accordingly.

Hello :

1:Remove the lamp from the projector. Ensure that it has no cracks, discoloration or "smoky" appearance.

2:Try removing and reseating the lamp, or to try another lamp.

3:Reset your lamp timer. Most projectors have no way of knowing if you physically have replaced your lamp or moved it out . They rely on the user resetting the lamp timer

4:Pull the lamp back out of the unit, give is a brisk shake and reseat the lamp. Occasionally there is some buildup on the lamp contacts or filament during manufacturing.

5:Are the input and output vents blocked or obstructed in any way? That could cause overheating problem and what you see with your projector is one of it's symptoms .

6:Are the filters dirty or clogged? Most manufacturers will recommend filter cleaning on a monthly basis depending on usage .After cleaning the filter always remember to reset your projector .

7:Remove any extension cords, power strips and/or surge suppressors. Many current model projectors will not even try to ignite the lamp if they detect drops or fluctuation in voltage supplied to the unit. This is a safety feature to reduce stress on the lamp.

PLEASE RATE !

Hi there

You will have to find out if this Projector supports Mac

Hi there

Does your Projector support Windows Vista ?