Editing Amiga 500 (section)

===Diagnostics===
When the computer is powered on a self-diagnostic test is run that will indicates failure with a specific colour:

#{{background color|#00B300|&nbsp;&nbsp;}} Medium green means chip RAM is not found or is damaged.
#{{background color|darkred|&nbsp;&nbsp;}} Red means bad [[Kickstart (Amiga)|kickstart]]-[[Read-only memory|ROM]].
#{{background color|yellow|&nbsp;&nbsp;}} Yellow means the [[central processing unit|CPU]] has crashed (no trap routine or trying to run bad code) or a bad [[Amiga Zorro II|Zorro]] [[expansion card]].<ref>[http://eab.abime.net/showthread.php?t=497 abime.net – Question blinking power LED/no screen on Amiga 500] read November 3, 2011</ref>
#{{background color|blue|&nbsp;&nbsp;}} Blue means a custom chip problem ([[Denise (OCS)|Denise]], [[Paula (computer chip)|Paula]], or [[Original Chip Set#Agnus|Agnus]]).
#{{background color|lime|&nbsp;&nbsp;}} Light green means [[MOS Technology CIA|CIA]] problem.
#{{background color|silver|&nbsp;&nbsp;}} Light gray means that the CIA might be defective.
#{{nowrap|{{background color|black|&nbsp;}} {{background color|black|&nbsp;}} Black and white stripes}}<!--verify?--> mean there is a ROM or [[MOS Technology CIA|CIA]] problem.
#{{background color|black|&nbsp;&nbsp;}} Black-only (no video) means there is no video output.<ref name=a3b>[http://amiga.serveftp.net/A3000_HardwareGuide/booting-problems.html amiga.serveftp.net – A3000 Booting Problems] {{Webarchive|url=https://web.archive.org/web/20120425132759/http://amiga.serveftp.net/A3000_HardwareGuide/booting-problems.html |date=April 25, 2012 }} read November 3, 2011</ref>

The keyboard [[light-emitting diode|LED]] uses blink codes:

#One blink means the keyboard ROM has a checksum error.
#Two blinks means RAM failure.
#Three blinks means watchdog timer failure.<ref name=a3b/>
'''<big>Measurements</big>'''

Overall (base): 6.2 cm x 47.4 cm x 33 cm; 2 7/16 in x 18 11/16 in x 13 in. <ref>{{Cite web |title=Commodore Amiga 500 Personal Computer |url=https://americanhistory.si.edu/collections/search/object/nmah_834010 |access-date=2023-09-27 |website=National Museum of American History |language=en |archive-date=September 12, 2023 |archive-url=https://web.archive.org/web/20230912221548/https://americanhistory.si.edu/collections/search/object/nmah_834010 |url-status=live }}</ref>