Error Codes for Original IBM PCs

Audio Messages
 
Sound                                Possible Problem
 
On short beep                        Normal
No beep                              Power to system unit
Continuous beep                      Power to system unit
Repeating short beep                 Power to system unit
One long and one short               System board
One long and two shorts              Display
One short and blank or               Display
  solid color display
One short and Basic                  Failed to boot
  statement
 
Visual Messages
 
Code           Possible Problem
 
02x            Power
1xx            System board
 
20x or
wzyy20n        Memory
 
30x or
xxx30n         Keyboard
 
4xx            Monochrome display
5xx            Color / graphics display
6xx            Disk drive
  606          Disk drive or adaptor
  607          Write protect circuity
  611-621      Disk drive controller or cable
  623-626      Disk drive failure
90x            Parallel printer adaptor
110x                Asynch communications adaptor
130x                Game control adaptor
140x                Printer
170x                Hard drive
 
Parity Check 1     Parity error in system board memory
Parity Check 2     Parity error in expansion board memory
 
Note.  On the memory error, the first digit identifies the 64K
bank which is failing.  This is in the range 0-9.