HP 280 G4 Maintenance And Service Manual

Cause Solution RTC (real-time clock) battery may need to be replaced. NOTE: Connecting the computer to a live AC outlet prolongs the life of the RTC battery. Reset the date and time under Control Panel (Computer Setup can also be used to update the RTC date and time). If the problem persists, replace the RTC battery. See the Removal and Replacement section for instructions on installing a new battery, or contact an authorized dealer or reseller for RTC battery replacement. To access Control Panel in Windows 10, type control panel in the taskbar sear ...

The computer has one PCI Express ×1 expansion socket and one PCI Express ×16 expansion socket. NOTE: You can install a PCI Express ×1, ×4, ×8, or ×16 expansion card in the PCI Express ×16 socket. For dual graphics card configurations, the first (primary) card must be installed in the PCI Express ×16 socket. To remove, replace, or add an expansion card: 1. Prepare the computer for disassembly (Preparation for disassembly on page 16). 2. Remove the access panel (Access panel on page 18). 3. L ...

Cause Solution The cable is not securely connected. Ensure that the cable is securely attached to the network connector and that the other end of the cable is securely attached to the correct device. The cable is attached to the incorrect connector. Ensure that the cable is attached to the correct connector. There is a problem with the cable or a device at the other end of the cable. Ensure that the cable and device at the other end are operating correctly. The network controller is defective. Contact an authorized service provider. Diagnostics passes, but the co ...

For a list of available WLAN modules, see Computer major components on page 4. 1. Prepare the computer for disassembly (Preparation for disassembly on page 16). 2. Remove the access panel (Access panel on page 18). 3. Remove the optical drive (Optical drive on page 22). 4. Remove the front bezel (Front bezel on page 26). 5. Remove the drive cage (Hard drive on page 24). 6. Disconnect the antenna cable from the module (1). 7. Remove the Phillips M2.0 × 3.0 screw (2), and then pull the module out of the socket (3). To install the WLAN ...

● Torx T-15 screwdriver ● Flat-bladed screwdriver (may sometimes be used in place of the Torx screwdriver) ● Phillips P1 screwdriver ● Torx T15 screwdriver Screws The screws used in the computer are not interchangeable. They could have standard or metric threads and may be of different lengths. If an incorrect screw is used during the reassembly process, it can damage the unit. HP strongly recommends that all screws removed during disassembly be kept with the part that was removed and then returned to their proper ...

Number of long beeps/blinks Error category 3 Hardware 4 Thermal 5 System board Patterns of blink/beep codes are determined by using the following parameters: ● 1 second pause occurs after the last major blink. ● 2 second pause occurs after the last minor blink. ● Beep error code sequences occur for the first 5 iterations of the pattern and then stop. ● Blink error code sequences continue until the computer is unplugged or the power button is pressed. NOTE: Not all diagnostic lights and a ...

Table 5-1 Computer Setup—Main Option Description Main ● System time Select to change. ● System date Select to change. ● Product name ● System family ● System board ID ● Born on date ● Processor type ● Total memory ● BIOS vendor ● BIOS revision ● Device firmware revision Select the view the following information: Embedded controller, Intel Management Engine, Graphic Output Protocol ● Serial number ● UUID ● System board CT number ● Factory ins ...