Figure 3. Curved edge
Memory Errors
Memory errors on the system display the new ON-FLASH-FLASH or ON-FLASH-ON failure code. If all memory fails, the LCD does not
turn on. Troubleshoot for possible memory failure by trying known good memory modules in the memory connectors on the bottom of the
system or under the keyboard, as in some portable systems.
Active State Power Management
This section describes about the Active State Power Management (ASPM).
ASPM
is the power management capability of hardware to effectively reduce usage of power by placing the PCI Express(PCIe) based
serial link devices to low-power state when not in use.
ASPM is controlled by BIOS or the power management component of the operating system in two configurations.
•
Disabled: PCIe devices operate on high-performance mode.
•
L1 Mode: Bi-directional setting of the serially linked PCIe device to low-power state.
NOTE:
This mode provides with higher power saving at expense of latency when re-establishing the connection.
The PCIe bus must be woken up from low-power mode to re-establish the connection with the device. This accounts for the latency, which
is also referred to as ASPM exit latency.
56
Technology and components
Summary of Contents for OptiPlex 5055 Tower
Page 1: ...Dell OptiPlex 5055 Tower Owner s Manual Regulatory Model D18M Regulatory Type D18M004 ...
Page 12: ...4 Lift the front bezel to remove it from the computer 12 Disassembly and reassembly ...
Page 44: ...b Slide and lift the system board away from the computer 2 44 Disassembly and reassembly ...
