What causes power rail failure on Dell Desktop?
If your Dell Desktop experiences a power rail failure, it indicates that the EC ran into a power sequencing failure. If the problem persists, replace the system board.
What to do if BIOS recovery image found but invalid on Dell OptiPlex 7090 Tower?
If the BIOS recovery image found is invalid on your Dell Desktop, flash the latest BIOS version. If the problem persists, replace the system board.
How to fix BIOS recovery image not found on Dell OptiPlex 7090 Tower Desktop?
If the BIOS recovery image is not found on your Dell Desktop, flash the latest BIOS version. If the problem persists, replace the system board.
How to fix memory address line failure on Dell OptiPlex 7090 Tower?
If your Dell Desktop shows 'MEMORY ADDRESS LINE FAILURE AT ADDRESS, READ VALUE EXPECTING VALUE', a memory module may be faulty or improperly seated. Reinstall the memory module or, if necessary, replace it.
What does optional ROM bad checksum mean on Dell OptiPlex 7090 Tower Desktop?
If your Dell Desktop displays 'OPTIONAL ROM BAD CHECKSUM', the optional ROM has failed. No answer.
What causes unexpected interrupt in protected mode on Dell OptiPlex 7090 Tower?
If your Dell Desktop displays 'UNEXPECTED INTERRUPT IN PROTECTED MODE', the keyboard controller may be malfunctioning, or a memory module may be loose. Run the System Memory tests and the Keyboard Controller test in Dell Diagnostics or No answer.
What to do if Dell OptiPlex 7090 Tower Desktop says operating system not found?
If your Dell Desktop displays 'Operating System not found', reinstall the operating system. If the problem persists, No answer.
How to fix system board failure on Dell Desktop?
To address a system board failure (including BIOS corruption or ROM error) on your Dell Desktop, flash the latest BIOS version. If the problem persists, replace the system board.
What to do if Dell OptiPlex 7090 Tower shows no boot device available?
If your Dell Desktop displays 'No Boot Device Available', the computer cannot find the hard drive. If the hard drive is your boot device, ensure that the drive is installed, properly seated, and partitioned as a boot device.
How to resolve invalid memory installed on Dell Desktop?
If your Dell Desktop says invalid memory is installed, reset the memory module. If the problem continues, replace the memory module.
General| Processor Options | 10th Gen Intel Core i3, i5, i7, i9 |
|---|---|
| Chipset | Intel Q470 Chipset |
| Memory | Up to 128GB DDR4 2933MHz |
| Storage Options | 2.5-inch HDD/SSD, M.2 PCIe NVMe SSD |
| Graphics Options | Integrated Intel UHD Graphics |
| Operating System | Windows 10 Home/Pro, Ubuntu Linux |
| Ports | Front: USB 3.2 Gen 2 Type-C, USB 3.2 Gen 1; Rear: USB 2.0 |
| Expansion Slots | 1 x PCIe x16, 1 x PCIe x4, 1 x PCIe x1 |
| Power Supply | 260W, 300W or 500W |
| Dimensions | 293.0 mm |
Covers safety guidelines, ESD protection, and handling sensitive components.
Steps to follow after completing internal computer work.
Lists tools, screw types, and identifies major system components visually.
Instructions for removing and installing the side cover and front bezel.
Procedures for 2.5-inch and 3.5-inch hard drives, and M.2 SSDs.
Steps for replacing memory modules and processor fan/heat sink assemblies.
Instructions for replacing the processor, graphics card, and powered GPU.
Procedures for coin-cell battery, WLAN card, and slim optical drive.
Steps for replacing chassis fan, VR heat sink, speaker, and power button.
Procedures for removing and installing the power supply unit and intrusion switch.
Instructions for replacing optional I/O modules and the system board.
Information on obtaining and installing system drivers.
How to access and navigate boot menus and system setup.
Details system configuration settings available in BIOS.
Procedures for assigning and managing system and setup passwords.
Running pre-boot diagnostics and interpreting LED error codes.
Explanations for diagnostic and system error messages.
Steps to perform a WiFi power cycle to resolve connectivity issues.
List of resources and methods for obtaining Dell support.
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