Many verified cases of "Download Standby" resolved simply by:
Canon part number for compatible DIMM: WG8-5655-000 (64MB) or WG8-5961-000 (128MB). Aftermarket equivalents: Crucial CT16M64S4D7E, Samsung M470L2923BT0.
The iR2016 uses standard SDRAM DIMMs for system memory. A faulty or incompatible DIMM can cause the boot sequence to halt and trigger Download Standby. The printer tries to load system code into RAM, fails, and reverts to standby mode waiting for fresh code. canon ir2016 download standby error verified
In older units, the NVRAM (Non-Volatile RAM) on the main board can become corrupted. Capacitors may leak, or flash memory cells wear out. When the machine boots, it reads a corrupt flag that indicates an unfinished download, triggering the error even if no update was ever attempted.
Through cross-referencing Canon’s internal service bulletins and real-world repair logs, the following verified causes emerge: Many verified cases of "Download Standby" resolved simply
Upon powering the unit, the following sequence was observed:
Verification Status: The error is consistent and reproducible upon every reboot cycle. Canon part number for compatible DIMM: WG8-5655-000 (64MB)
[!] Error: Download Standby Error VerifiedCause: Ready signal not received from main controller.
Actions: [ ] Auto-reset download state machine [ ] Retry with slower communication speed [ ] Force download mode (advanced) [ ] View hardware check list
Status: Retry #2 – waiting for standby...