Off hand I suggest you disconnect the Video Cable.
May be mistaken, but I think there is enough damage to the LCD screen, that it is causing only Safe Mode to be used.
Of course it does depend on how the LCD screen was cracked.
Dropped the laptop while it was on? Going to be Harddrive damage, and possibly further damage through the laptop.
Let's start by disconnecting the Video Cable connection, at the motherboard side. Then see if the external monitor works, and in normal mode.
I don't find an Acer Aspire 1094z, but I do find an Acer Aspire 3050-1094.
Acer - Manufacturer
Aspire - Model Series Name
3050 - Model Series Number
1094 - Model Number
If this is incorrect state back in a Comment.http://www.tim.id.au/blog/tims-laptop-service-manuals/#toc-acer
Go to the 'paragraph' that starts with Aspire 1200. (1200 in Blue)
Drop down to the third line (2930), scroll across; click on the blue - 3050.
[Ignore if you are aware;
This is a PDF file. The computer you are using now has Adobe Reader on it, which uses PDF files.
After you click on the file name (3050) it may take up to 30 seconds, before the first page comes up.
When I refer to a page number, it will be for the Adobe Reader page number box at the Top, to the right of the Down Arrow.
The Zoom In icon ( + ) at the Top increases the view size, when you click on it.
The Zoom Out icon ( - ) decreases the view size.
IF this applies;
Click on the icon at the Top/Left corner. Toggle Slider.
There will be two square icons.
Show Thumbnails on the Left, Show Document Outline on the Right.
Click on Show Document Outline to see the Bookmarks menu ]
1) Remove ALL power. Remove the AC adapter (Charger), and Battery.
2) Laptop closed, normal position except the Back is facing you.
There are two screws to remove, in order to remove the
Bottom of Page 67, top of Page 68.
Philips head screw, one on EACH side.
They are in the black plastic of the laptop, and next to the silver 'lid'.
(Display Cover = 'Lid')
Turn the laptop around, front facing you; open the laptop.
The Keyboard Cover is the strip of plastic above the Keyboard.
The Hinge Covers are an integral part of this cover.
The Microphone Cable is attached to the Launch Board, and the Launch Board is attached to the bottom of the Keyboard Cover.
For this reason suggest go slow, so you do not damage the cable (Wires); when removing Keyboard Cover.
Once the cover is lifted off, disconnect the Microphone Cable from the Launch Board.
This is an example of the Keyboard Cover removed,http://www.cdsparts.com/p-379-new-acer-aspire-3050-3680-5050-5570-5570z-5580-middle-keyboard-cover.aspx
Suggest come to the Right side of the cover, and ease it up a little, by inserting a thick guitar pick; into the parting line.
(Where the Keyboard Cover meets the Bottom Cover)
Insert how far? About 1/4th Inch, or half the length of your little finger's thumbnail.
Ease that end up a little, so that you can get a fingertip underneath, then using fingers of both hands; ease up on the top, and bottom side of the cover; as you head towards the Left side.
(Sorry about the run-on sentence)
The cover may just pop off as you start, or you may have to carefully go along, and ease up on it all the way.
To the Left by the left Hinge, you will see motherboard side of the Video Cable.
White piece of Mylar plastic tab to gently pull up on, and this unplugs the Video Cable from the motherboard.
A look at the motherboard side connection of the Video Cable, in a pictorial guide,http://forum.notebookreview.com/acer/352528-aspire-3050-upgrade-sempron-turion-x2-tl-50-a.html#post4515287
Scroll down to about half page, look at the photo under the heading -
h. remove the long cover, and remove the two screws on the keyboard.
See what looks to be a white piece of tape, over by the left Hinge?
That's the motherboard connection side of the Video Cable, and the white pull tab.
Also details how to replace the LCD screen.
If you wish to do this, I would appreciate a Comment back, so I can give you some tips, and possible guidance if you wish it.
Unplug it. Attach the Microphone Cable again, but leave the Keyboard Cover loose.
(You can't reinstall the cover, because the unplugged Video Cable is in the way )
Reinstall the Battery.
Plug the AC adapter into the laptop, THEN plug the AC adapter into power.
Turn the laptop on.
Post back in a Comment.