HP LaserJet M9040/M9050 Service Manual - Page 349
Low-level boot-up key sequence for selecting a language, performing a cold reset
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Low-level boot-up key sequence for selecting a language, performing a cold reset, and enabling and disabling embedded LAN 1. Turn off the product. 2. Turn on the product. 3. When the control-panel display shows that the product has begun to count the memory, press and hold the 6 key. 4. When the LED lights turn on, release the 6 key. 5. Use the 3 and 9 keys to scroll through the options (select language, cold reset, embedded LAN enable, and embedded LAN disable) and then press the 6 key to select the option you want. The product continues the power-on sequence. Medium-level boot-up key sequence for initializing disks 1. Turn off the product. 2. Turn on the product. 3. When the control-panel display shows that the product has begun to count the memory, press and hold the Start key. 4. When the LED lights turn on, release the Start key. NOTE: Initialize Disks is the only option available when using the medium-level boot-up key sequence. 5. Press the 6 key to select Initialize Disks. The product continues the power-on sequence. High-level boot-up key sequence for NVRAM initialization, manufacturing, and skipping disk-load and calibration 1. Turn off the product. 2. Turn on the product. 3. When the control-panel display shows that the product has begun to count the memory, press and hold the 9 key. 4. When the LED lights turn on, release the 9 key. 5. Press the 3 key, and then press the Start key. 6. Use the 3 and 9 keys to scroll through the options (skip disk-load, NVRAM init, manufacturing, and skip calibration) and then press the 6 key to select the option you want. The product continues the power-on sequence. ENWW Other diagnostics 331