Formatter
Formatter heartbeat LED
The heartbeat LED indicates that the formatter is functioning correctly. While the product is initializing after you turn the product on, the LED blinks rapidly, and then turns off. When the product has finished the initialization sequence, the heartbeat LED pulses on and off. For more information abut the heartbeat LED see Formatter heartbeat LED on page 133.
DIMM slots
CAUTION: Single inline memory modules (SIMMs) used in previous HP LaserJet products are not compatible with the product.
The formatter has one dual inline memory module (DIMM) slot for upgrading the product with more memory.
To find out how much memory is installed in the product, print a configuration page. For more information about memory, see DIMM cover and DIMM on page 57.
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