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• First decide whether the unit that keeps switching off is the in-home display (IHD) or the physical smart meter on the wall/board.
• If it’s only the IHD, try a reset, a different charger/outlet, or move it closer to the meter; if that fails ask your supplier for a replacement.
• If the meter itself loses power, turn off your main breaker to rule out a house-side fault and call your utility immediately – a loose service connection or an internal meter failure is likely and must be handled by qualified personnel.
Definitions
• Smart meter: Utility-owned meter that measures consumption and communicates over WAN/HAN.
• IHD: Low-voltage consumer display powered from a wall wart or internal Li-ion pack.
Typical fault domains
A. IHD only
– PSU/charger dead → battery discharges → reboots.
– Aged Li-ion (≈3–5 y) loses capacity.
– Weak HAN signal; some IHDs reboot when the ZigBee link drops.
– Firmware loop after OTA update (IHD6 “1 min 14 s” cycle is common).
B. Smart meter / supply side
– Loose jaws in meter base → high-resistance contact → undervoltage → repeated boot. Major fire risk.
– Corroded/burnt socket blades, service drop or neutral break.
– Internal SMPS failure (electrolytic caps, opto-isolator).
– Thermal or over-current protection trip.
– Corrupt firmware after remote update.
– Moisture ingress / insect nests causing leakage paths.
C. Customer load fault (rarer)
– Intermittent line-to-neutral fault that collapses voltage only when main is on.
– Loose load-side lugs in meter base.
Safe step-by-step isolation
1) Observe – note any error codes, LED blinks, audible arcing.
2) If whole meter cycles, switch off main breaker; re-observe:
• Meter now stable ⇒ fault on house circuits; bring breakers up one-by-one to locate.
• Still unstable ⇒ fault in meter or supply; call utility emergency line.
3) For IHD only:
• Unplug, hold power 10 s, reconnect.
• Test with known-good 5 V/9 V charger (check rating on label).
• Operate within 3 m of meter through one stud wall max.
• If battery-powered, run without battery (charger only) to see if pack is shorted.
• UK SMETS2 roll-outs: suppliers can now push remote firmware that often cures IHD reboot loops; replacement IHDs (Chameleon IHD6, ivie Bud) are available free under warranty for up to 12 months and at low cost thereafter.
• Remote metrology firmware (DLMS/COSEM) updates have reduced meter-side boot loops but may brick early SMETS1 devices – many utilities swap them pre-emptively.
• Next-gen IHDs are moving to app-only solutions; failures become less critical as cloud dashboards substitute the display.
• Utilities in North America increasingly use ANSI C12.22 head-end capable of flagging “brown-out on meter PSU” events before total failure.
Electric smart meters derive a few watts via a capacitive dropper or fly-back SMPS from the 120/230 V line. If the input jaw contact adds 0.5 Ω and the meter draws 30 mA, the 0.75 V drop seems small but the dissipation \(P=I^{2}R≈0.45 W\) in a few mm² contact spot reaches >200 °C locally, carbonising plastic and tripping thermal sensors – hence intermittent resets.
IHD chargers are usually 5 V 1 A SMPS; an exhausted 1 Ah Li-ion will sag to 3 V during GSM bursts, forcing a reboot every minute (seen in Chameleon IHDs).
• The sealed meter is utility property; breaking seals is illegal (The Electricity (Meter Charges) Regulations 2016, NECode 2 in US).
• Opening the meter base exposes lethal voltages and potential arc-flash; only licensed electricians or utility technicians with PPE should intervene.
• Data privacy: meter logs include half-hourly usage; ensure supplier complies with GDPR/CCPA when replacing devices.
Implementation flowchart for end-user:
• Some meters purposely blank the display after a set idle period to save LCD life; pressing any button should wake them – this is not a fault.
• Pre-payment meters with low credit can cut supply; ensure credit is present before further diagnosis.
• Regional differences: in Australia, meter bases are also utility property; in most of the US the socket belongs to the customer – check local code.
• Study of contact pressure degradation in spring-jaw meter bases (IEEE T&D paper PES2023-312).
• Effectiveness of remote firmware self-healing (DLMS push) vs truck-roll replacements.
• Development of BLE-based low-power IHD alternatives.
• Investigate AI-based predictive maintenance using head-end voltage sag telemetry.
An IHD that won’t stay on is usually a low-voltage power or battery issue you can troubleshoot safely; a smart meter that reboots or blanks points to a supply-side connection or internal PSU failure and constitutes a safety hazard. After turning off your main breaker to confirm the fault domain, involve your energy supplier or a licensed electrician – never open the meter yourself.