Dell Vostro 3490 Service Manual

Also see for Vostro 3490: Technical guidebook Owner's manual Setup and specifications guide Quick start guide

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Dell Vostro 3490 Service Manual Manual pdf 94 page image

For example, the power and battery-status light blinks amber two times followed by a pause, and then blinks white three times followed bya pause. This 2,3 pattern continues until the computer is turned off indicating no memory or RAM is detected.The following table shows different power and battery-status light patterns and associated problems.Table 9. LED codesDiagnostic light codes Problem description2,1 Processor failure2,2 System board: BIOS or ROM (Read-Only Memory) failure2,3 No memory or RAM (Random-Access Memory) detected2,4 Memory or RAM (Random-Access Memory) failure2,5 Invalid memory installed2,6 System-board or chipset error2,7 Display failure3,1 Coin-cell battery failure3,2 PCI, video card/chip failure3,3 Recovery image not found3,4 Recovery image found but invalid3,5 Power-rail failure3,6 System BIOS Flash incomplete3,7 Management Engine (ME) errorCamera status light: Indicates whether the camera is in use.• Solid white — Camera is in use.• Off — Camera is not in use.Caps Lock status light: Indicates whether Caps Lock is enabled or disabled.• Solid white — Caps Lock enabled.• Off — Caps Lock disabled.Flashing BIOS (USB key)Steps1. Follow the procedure from step 1 to step 7 in "Flashing the BIOS" to download the latest BIOS setup program file.2. Create a bootable USB drive. For more information see the knowledge base article SLN143196 at www.dell.com/support.3. Copy the BIOS setup program file to the bootable USB drive.4. Connect the bootable USB drive to the computer that needs the BIOS update.5. Restart the computer and press F12 when the Dell logo is displayed on the screen.6. Boot to the USB drive from the One Time Boot Menu.7. Type the BIOS setup program filename and press Enter.8. The BIOS Update Utility appears. Follow the instructions on the screen to complete the BIOS update.Flashing the BIOSAbout this taskYou may need to flash (update) the BIOS when an update is available or when you replace the system board.Follow these steps to flash the BIOS:94 Troubleshooting

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