41 lines
1.4 KiB
Plaintext
41 lines
1.4 KiB
Plaintext
=============================================================================
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AST RESEARCH, INC. TECHNICAL BULLETIN #0678A 02-05-92
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=============================================================================
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PREMIUM EXEC BATTERY MANAGEMENT CONTROLLER
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Under certain circumstances, some Premium Exec 386SX/20 computers may exhibit
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one or more of the following problems when connected to the AC adapter after
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the battery has been completely discharged:
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- Battery will not charge completely.
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- Over charge of battery.
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- Erroneous battery charge level indicators (LED) when connected to the
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AC Adapter.
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- Low battery alarm when connected to the AC Adapter.
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- Intermittent loss of display when booting.
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To resolve these problems, it is necessary to reset the Battery Management
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Controller (BMC) chip. To accomplish this, follow the steps listed below:
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1. Power off the Premium Exec.
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2. Disconnect the AC Adapter from the Premium Exec.
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3. Wait approximately 10 to 15 seconds, reconnect the AC Adapter to the
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Premium Exec.
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4. Power the Premium Exec back on.
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If this does not resolve the problem, the system may have a defective BMC
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chip. Contact AST or your nearest AST Authorized Service Center to have this
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chip replaced (re: Field Change Notice #0058).
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