Apple II - Page 136

Problems with a display device
Nothing appeani on the screen when } uu lunl on the pOwCr'.
When you see a blank screen even after the: disk in-use light comes
on and you hear the the disk drive working, check these four things:
• Is the monitor turned on?
• Is lhe monitor electrical cord plugged m?
• Is the monitor able plugged into the computer and into the
monitor'
• Arc the contrast and brightness properly adJUsted?
If you're working with ;I 1" .set., is the RF modulator properly
insulled? Is ilS s\\'itch properly scI? Is the 1" In workmg order'
If your lV .set h2s :l wilt-in video pck. check !he Switch on the back
of the 1" Is il sel to "1V" or 10 'Video"?
If you're working "'ith an RGB card, is Ihe card properly insullcd
-and is the able propcrly connected?
If none of these is the problem, IUrn ofT the po .... 'Cf and lake the lOp
orr the computer. Is there a aud in slot 3' It could be interfering
with rour display. Remo\'c the cud, rcpl:l.cc the co\'Cr, and switch
the computer on again.
111C sa-ccn image is too bright Of 100 dim.
The monitor's contrast or brighlIleSS isn't sct properly Adjust the
conlr.lst or brightness knob until the display is casy to rcad (Sec the
monitor manual to locate the controls.)
Unusual dJaf'aClCl'S are inl.emlingloo wilh rcguL"U' text.
111e presence of non-keyboard charactcrs Oiule arrows, check
marks, and odd symbols) indicalC that the application program
you're using was designed for earlier models of the Apple lIe and i\
using a character set now reserved for r.louscTeXl characters. Ask
your dealcr if you can replace your program for an upgradcd
vcrsion.
118 AppendiX C: Troubleshooting