The short answer
On the Black Decker BDCM microwave an oven that will not start is usually the panel itself rather than anything the oven is waiting for. BDCM is a single build, so the checks below apply across the model list. Settle one thing before anything else: whether the display is dead or lit and refusing. Those two symptoms share almost no causes and each has its own half of this page.
What you observe
- No display, no light, no fan — Supply side: outlet, plug, breaker, or the oven's own internal protection.
- The display is lit and start does nothing — The oven is alive and refusing.
- It counts down without running — The timer function rather than a cook cycle: an easy mistake on a panel that offers both.
- It runs for a second and stops — A door interlock making and breaking, or protection cutting in.
- NEAR MISS — it runs and the food stays cold — That is a heating fault rather than a start fault, and the heating page is the right one.
Causes, most likely first on the BDCM family
- Keypad membrane failure — First on this family — BDCM is a single build — and a flat membrane panel above a hot cavity is the part that ages fastest: keys stop responding one region at a time, and start is often the first to go because it is pressed most.
- Child lock or an unfinished programme — Second and free: both make a healthy panel appear dead, and both clear in seconds once you know to look.
- Door interlocks not being satisfied — Third: the oven accepts the programme and refuses to run, which is a different symptom from keys that do nothing at all.
- Supply and internal protection — Last on this ranking: they give a dark display, so a lit panel rules them out before you start.
Check in this order, and why
- Press every key in turn and note which respond — First: a map of dead regions on the panel is a diagnosis in itself and costs nothing.
- Check for a lock symbol and clear any held programme — Second — free, and it explains a panel that appears entirely unresponsive.
- Enter one simple cycle from scratch with the door closed firmly — Third: it tests the interlocks and the control together.
- Test the outlet if the display is dark at any point — Last of the free checks, and the first one worth doing on a dead panel.
Before you open anything
Safety
Unplug the oven before touching anything beyond the cavity and the door — and then still do not open the cabinet: the high-voltage capacitor inside can hold a lethal charge long after the oven is disconnected, which makes this the one kitchen appliance that can injure you after it is switched off. Never tape, wedge or otherwise defeat a door interlock, never run the oven empty, and stop using it altogether if the door, its inner panel or its mesh is bent, cracked or burned.
Models in the BDCM family
Reference| Model number | Family key |
|---|---|
| BDCM11100SSB | black-decker:microwave:bdcm |
When to call a technician
Call, or replace the oven, when the outlet is proven live, the door closes firmly, no lock is set and the panel still will not accept a cycle — the remaining causes are inside a cabinet that must not be opened at home. Stop using it immediately if it died with a bang, a smell or a trip: that combination points at the high-voltage side.
Other faults covered for the BDCM family
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