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What This Guide Helps With
Troubleshooting no power, intermittent power, blown fuse, failed power supply, or suspected control board failure on a Brewer AssistPRO 7500 Series chair.
Step-by-Step Troubleshooting
Ensure Patient Safety First
Do not troubleshoot chair power issues while a patient is seated unless it is safe and clinically necessary.
Action:
- Remove the patient from the chair if possible.
- If the chair is stuck in a raised, reclined, or unsafe position, get clinical help before moving the patient.
- Do not continue using the chair if it loses power, moves unpredictably, or repeatedly trips power.
Expected outcome: The patient is safely moved away from a chair with an unresolved electrical or control issue.
Why it matters: Power and control faults can affect chair movement, positioning, and patient transfer safety.
Verify the Reported Power Issue
Action:
- Ask staff what happened.
- Confirm whether the chair is completely dead, powers on briefly, moves intermittently, blows a fuse, or fails only with certain controls.
- Check whether the issue occurred after relocation, cleaning, a power outage, liquid spill, or accessory damage.
Expected outcome: The failure pattern is confirmed before replacing parts.
Why it matters: A dead chair, intermittent chair, and blown-fuse complaint may have different causes.
Check the Wall Outlet
Action:
- Plug a known-working device into the same outlet.
- Confirm the outlet has power.
- Check whether the outlet is controlled by a wall switch, emergency power circuit, or GFCI.
- If applicable, reset the GFCI or have Facilities check the circuit.
Expected outcome: The outlet supplies stable power.
If the outlet is faulty, stop troubleshooting the chair and report the facility power issue.
Inspect the Power Cord
Action:
- Unplug the chair.
- Inspect the entire power cord for cuts, crushed areas, exposed conductors, loose strain relief, bent blades, damaged plug, or signs of overheating.
- Verify the cord is fully seated at the chair if it uses a detachable connection.
Expected outcome: The power cord is intact and properly connected.
If the cord is damaged, remove the chair from service and replace the cord with the correct approved part before further use.
Check for Power Cord Strain or Pinching
Action:
- Look behind and underneath the chair.
- Verify the cord is not trapped under the base, wrapped around moving parts, pinched by the lift mechanism, or stretched when the chair moves.
- Reposition the cord safely.
Expected outcome: The cord has a safe path and is not being stressed during chair movement.
If repositioning the cord restores power, test full chair movement and stop if normal operation returns.
Verify the Chair’s Power Switch or Main Power Input
Action:
- Check the main power switch, if equipped.
- Turn the chair off, wait briefly, and turn it back on.
- Observe for indicator lights, relay clicks, display lights, or any sign of power.
Expected outcome: The chair powers up normally.
If the chair remains completely dead, continue with fuse and power input checks.
Inspect the Fuse Holder and Fuse
Action:
- Unplug the chair before checking any fuse.
- Inspect the fuse holder for looseness, discoloration, heat damage, corrosion, or broken contacts.
- Check the fuse and confirm it matches the correct rating and type listed for the chair.
- Do not bypass the fuse or install a higher-rated fuse.
Expected outcome: The fuse is intact, properly rated, and seated correctly.
If the fuse is blown, replace only with the correct type and rating, then retest.
Determine Whether the Fuse Blows Again
Action:
- After replacing the fuse with the correct rating, power the chair on.
- Do not repeatedly replace fuses if the new fuse blows immediately or shortly after movement.
Expected outcome: The chair powers on and remains powered.
If the fuse blows again, remove the chair from service.
Why it matters: A repeat blown fuse suggests an internal short, motor issue, power supply fault, wiring fault, or control board problem.
Check External Controls Before Suspecting the Control Board
Action:
- Disconnect and reconnect the hand control and foot control connections if accessible without disassembly.
- Inspect control cables for damage, liquid intrusion, bent pins, loose connectors, or crushed wiring.
- If a known-good compatible control is available, swap one control at a time.
Expected outcome: The chair responds normally with a good control connected.
If replacing or reseating an external control restores function, document the failed control and stop.
Listen and Observe During Power-Up
Action:
- Power the chair on and observe behavior.
- Look for indicator lights, clicking, humming, burning smell, unusual heat, or intermittent response when the cord or controls are moved.
Expected outcome: The chair powers consistently without abnormal sound, odor, or heat.
If there is burning smell, unusual heat, arcing, repeated clicking, or smoke, unplug the chair and remove it from service immediately.
Check for Signs of Liquid Intrusion or Cleaning Damage
Action:
- Inspect around the power inlet, control connectors, hand control, foot control, and base area.
- Look for residue, corrosion, moisture, sticky fluid, or cleaning solution pooling.
Expected outcome: No signs of liquid damage are present.
If liquid intrusion is suspected, do not continue powering the chair until it is evaluated on the bench.
Confirm Whether the Failure Is Internal
Action:
- If the outlet, power cord, fuse, external controls, and visible connections check good but the chair remains dead or unstable, suspect an internal power supply, wiring, motor load, or control board issue.
Expected outcome: External causes have been ruled out.
At this point, do not continue field troubleshooting beyond safe external checks.
If the Problem Persists
If the chair still has no power, repeatedly blows fuses, loses power intermittently, or shows signs of internal electrical failure, the common external causes have been ruled out.
The device should be:
- Removed from service.
- Labeled Out of Service.
- Sent for repair or bench evaluation.
Do not keep replacing fuses, bypass safety components, or assume the control board is bad before confirming the power cord, outlet, fuse rating, controls, and visible connections. Knowing when to stop is proper troubleshooting.
Clinical Use Tip
Do not troubleshoot power or movement issues while the chair is supporting a patient unless patient transfer is unsafe. Move the patient to another chair or table first whenever possible. A chair with intermittent power should not be trusted for positioning or transfer.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Staff reported the Brewer AssistPRO 7500 Series procedure chair would not power on and would not raise or lower."
Cause
What was observed during troubleshooting.
Example:
"Verified wall outlet power was good, power cord was intact, but the chair fuse was blown and failed again after replacement with the correct rated fuse."
Resolution
What action was taken.
Example:
"Removed the chair from service, labeled it Out of Service, and sent it for bench evaluation for suspected internal power supply or control circuit fault."
Helpful Details to Include (If Known)
- Outlet tested and confirmed good.
- Power cord inspected for damage.
- Fuse rating verified before replacement.
- Whether the replacement fuse held or blew again.
- Control cables checked for damage or loose connection.
- Any indicator lights, clicks, hums, or total no-power condition.
- Any unusual smell, heat, residue, or signs of liquid intrusion.
- Environmental factors, including relocation, cleaning, power outage, liquid spill, or accessory damage.
- Final device status: returned to service, removed from service, or sent for repair.
Final Thought
Power problems on a procedure chair should be approached carefully and logically. Start with the outlet, cord, fuse, controls, and obvious external damage before suspecting the power supply or control board. If the chair repeatedly blows fuses, loses power, or shows signs of internal electrical failure, remove it from service and document the findings clearly.
That is successful troubleshooting.