Beep Codes - HP Officejet LH 6000 Service Manual

Chapter 4
Test
Cache Memory Test
Keyboard/Mouse
Controller Test
Timer 0/Timer 2 Test
DMA Sub-system Test
Interrupt Controller
Test
RAM Address Line
Independence Test
Real-Mode Memory
Test (First 640 K)
Shadow RAM Test
Real-Time Clock Test
Keyboard Test
Mouse Test
Flexible Disk
Controller Subsystem
Test
Internal Numeric
Coprocessor Test
Serial Port Test
Parallel Port Test
Hard Disk Subsystem
Test
System Configuration
Tests

Beep Codes

If the POST routines cannot display messages when an error occurs before the video display is initialized,
the server emits a series of beeps. This means that if on boot you get a blank screen, but hear beeps, you
should refer to the table below to interpret the beeps.
Tests the processor's on-chip (internal) cache RAM. Test failure causes an error
message to be displayed and the boot process to abort.
Checks for proper operation of the Keyboard/Mouse Controller. Test failure
causes an error code to be displayed.
Tests Timer 0 and Timer 2. Test failure causes an error code to be displayed.
Checks the DMA controller registers. Test failure causes an error code to be
displayed.
Tests the interrupt masks, the master controller interrupt path (by forcing an
IRQ0), and the industry-standard slave controller (by forcing an IRQ8). Test failure
at any point causes an error code to be displayed.
Verifies the address independence of real-mode RAM (that address lines are not
stuck together). Test failure causes an error code to be displayed.
Read/write test on system real-mode RAM. The test checks each block of system
RAM to determine how much is present and displays the current base value upon
successful completion of the test. Test failure of a 64 K block of memory causes
an error code to be displayed and the remainder of the memory test to be
skipped.
Tests Shadow RAM in 64-Kbyte segments, except for the segments beginning at
A000h, B000h, and F000h. If they are not being used, segments C000h, D000h,
and E000h are tested. Test failure causes an error code to be displayed.
Checks the real-time clock registers and performs a test that ensures the clock is
running. Test failure causes an error code to be displayed.
Invokes built-in keyboard self-test of keyboard's microprocessor and tests for
stuck keyboard keys. Test failure causes an error code to be displayed.
Invokes built-in mouse self-test of mouse's microprocessor and tests for stuck
mouse buttons. Test failure causes an error code to be displayed.
Tests for proper operation of the flexible disk controller. Test aborts after the first
error is found and will not test any further. Test failure causes an error code to be
displayed.
Checks for proper operation of the numeric coprocessor part of the processor.
Test failure causes an error message to be displayed and the boot process to
abort.
Tests the embedded serial port registers. Test failure causes an error code to be
displayed.
Tests the one embedded parallel port, if it is enabled. Test failure causes an error
code and an error message to be displayed.
Tests for proper operation of the hard disk controller and performs a read-verify of
a sector on the disk. Test aborts after the first error is found and will not test any
further. Test failure causes an error code to be displayed.
Checks for configuration errors and checksums accessory ROMs. Test failure
causes an error code to be displayed.
Description
Diagnostics
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