Beep Codes*

POST Description

3-4-4-1

Clear parity checkers.

3-4-4-2

Display MultiBoot menu.

3-4-4-3

Clear screen (optional).

3-4-4-4

Check virus and backup reminders.

4-1-1-1

Try to boot with INT 19.

4-1-1-2

Initialize POST Error Manager (PEM).

4-1-1-3

Initialize error logging.

4-1-1-4

Initialize error display function.

4-1-2-1

Initialize system error handler.

4-1-2-2

PnPnd dual CMOS (optional).

4-1-2-3

Initialize note dock (optional).

4-1-2-4

Initialize note dock late.

4-1-3-1

Force check (optional).

4-1-3-2

Extended checksum (optional).

4-1-3-3

Redirect Int 15h to enable remote keyboard.

4-1-3-4

Redirect Int 13h to Memory Technologies Devices such as ROM, RAM, PCMCIA, and serial disk.

4-1-4-1

Redirect Int 10h to enable remote serial video.

4-1-4-2

Re-map I/O and memory for PCMCIA.

4-1-4-3

Initialize digitizer and display message.

4-2-1-3

Unknown interrupt.

4-3-1-1

Initialize the chipset.

4-3-1-2

Initialize the bridge.

4-3-1-3

Initialize the CPU.

4-3-1-4

Initialize system timer.

4-3-2-1

Initialize system I/O.

4-3-2-2

Check force recovery boot.

4-3-2-3

Checksum BIOS ROM.

4-3-2-4

Go to BIOS.

4-3-3-1

Set Huge Segment.

4-3-3-2

Initialize Multi Processor.

4-3-3-3

Initialize OEM special code.

4-3-3-4

Initialize PIC and DMA.

4-3-4-1

Initialize Memory type.

4-3-4-2

Initialize Memory size.

4-3-4-3

Shadow Boot Block.

4-3-4-4

System memory test.

4-4-1-1

Initialize interrupt vectors.

4-4-1-2

Initialize Run Time Clock.

4-4-1-3

Initialize video.

4-4-1-4

Initialize System Management Manager.

4-4-2-1

Output one beep.

4-4-2-2

Clear Huge Segment.

4-4-2-3

Boot to Mini DOS.

4-4-2-4

Boot to Full DOS.

1 long,

Improper video configuration (reprogram EEPROM) or external ROM checksum failure.

2 short

 

3-22 Troubleshooting and Diagnostics

Service Manual

Page 94 Page 96
Page 95
Image 95
HP 2135AD, 2175EA, 2164EA, 2163EA, 2160US, 2158EA, 2165EA, 2166EA, 2505AP, 2502AP, 2500AP, 2156EA, 2117AP manual Clear parity checkers
Page 94 Page 96

2550CA, 2542EA, 2562AP, 2555AP, 2136AD specifications

The HP 2135US is a versatile all-in-one desktop computer designed to meet the needs of home and small office users. This robust machine is particularly attractive for individuals who seek a blend of performance, aesthetics, and user-friendly features.

At the heart of the HP 2135US is its powerful Intel Core processor. This series of CPUs provides reliable performance for multitasking and productivity tasks, ensuring smooth operation whether you're working on documents, browsing the web, or streaming multimedia content. Complementing the processor is a competent amount of RAM, allowing users to run multiple applications simultaneously without experiencing slowdowns.

The computer features a vibrant display that brings visuals to life. With high resolution and excellent color accuracy, the HP 2135US is ideal for photo editing, video playback, and gaming. The screen's size also contributes to an immersive experience, making it suitable for both leisure and professional uses.

Storage is another significant feature of the HP 2135US. It comes equipped with a sizeable hard drive, providing ample space for files, applications, and media libraries. Furthermore, the device offers options for solid-state drives, which enhance the system's speed and responsiveness. This blend of storage solutions ensures that users can choose configurations that best fit their needs.

Connectivity is a strong suit of the HP 2135US, as it includes a range of ports and wireless options. Multiple USB ports allow for easy connection of peripherals such as printers, keyboards, and external storage devices. Additionally, integrated Wi-Fi and Bluetooth capabilities enable seamless networking and device pairing, enhancing the overall user experience.

The integrated graphics in the HP 2135US ensures decent performance for everyday tasks and light gaming. Combined with its multimedia features, the computer serves as a capable entertainment hub for users who enjoy watching movies or playing games.

In terms of design, the HP 2135US boasts a sleek, modern aesthetic that fits well in any environment. Its compact form factor makes it space-efficient, an important consideration for users with limited workspace. The ergonomics of the design also contribute to comfortable usage over extended periods.

To sum up, the HP 2135US represents a blend of performance, connectivity, and design sophistication. Its comprehensive set of features makes it an excellent choice for users seeking an all-in-one solution for both work and play, proving itself to be a worthy addition to any modern workspace or home office setup.
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