Read Sharp ER-A410 / ER-A420 (serv.man17) Technical Bulletin online
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3. Install the IPL ROM to the IC socket of the MAIN PWB.
4. Turn the mode key switch to SRV’ position, and insert AC plug in AC outlet.
5. Turn the mode key switch to SRV position. The IPL procedure is started.
When the procedure is completed, the message of “Completed.” Is shown.
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