Logic 1121B Circuit Board
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Logic 1121B is the main control (logic) board used in LiftMaster/Chamberlain garage‑door opener systems. Common failure modes include burned or tripped relays, damaged ICs from voltage spikes, and loose or corroded connector pins that interrupt signal paths. First‑check steps: verify 24 VAC power at the input terminals, inspect all solder joints for cracks or burn marks, and test the board’s output to the motor driver using a multimeter or oscilloscope. If the board passes these checks, review any stored error codes on the opener’s display panel before proceeding with component replacement.[oss-gpt-20b] |
Need your Logic repaired or tested?
We specialize in the repair and refurbishment of high-end industrial control electronics and power systems like this unit.
- ⚙️ Fast Diagnostics – Same-day evaluation available
- 🔁 Reliable Turnaround – Most jobs ship within 5–10 business days
- 🧰 Expert Technicians – Decades of board-level experience
- ✅ 1-Year Warranty – Every repair fully guaranteed
📞 Call Now: 1 (336) 969-0110
Free Estimates • Industrial-grade testing • Nationwide Service
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Industrial AI Hardware Recovery — Free Diagnostic • Pay Return Shipping Only
[oss-gpt-20b]We reclaim and repair GPUs and industrial AI hardware (cards, PSUs, fan modules, VRM boards). Free estimate — you only pay return shipping if you decline.
- 🔧 Board-level diagnostics (shorts, VRM, memory, fan, thermals)
- 🧪 Burn-in + benchmarks (hash/matrix, memtest, stability)
- ♻️ Option: donate failed cards for parts → we refurb + resell
- ✅ 1-Year warranty on completed repairs
Free Estimates • Industrial-grade testing • 1-Year Warranty • Nationwide Service
Other Repaired Units by Logic
Logic PC-P-86-94V-0 Circuit BoardLogic 1121B Circuit BoardLogic PCB1113D Circuit BoardLogic 3 531 3722A Circuit BoardLogic PC-P-86-94V-0 Power SupplyContact Us
🚑Shop Location🛠️
Industrial Electronic Repair
145 Rockwell Place Ct
Tobaccoville, NC 27050
🚑 Rush repair shipments only — no walk-ins.
📞Phone
📦Mailing Address🚛
Industrial Electronic Repair
931-E S. Main St #204
Kernersville, NC 27284
📦 Mailing Address (for invoices or shipped repairs)
No walk-ins accepted.