How to Fix Unexplained Losses in Gaming Equipment Step by Step
An operator in Bogota, Colombia, had been losing money on his coin pusher and jackpot machines for eight months. He had tried everything he could think of: called the manufacturer, swapped out the mainboards, replaced the power supplies, rotated the machines to different locations, changed the game software versions. Nothing worked. The losses continued. When I arrived at his venue, I did not start by opening machines or running diagnostics. I started by sitting down with his revenue data for the past 12 months and asking a simple question: when exactly did the losses begin, and what changed in the venue at that time? The answer took two hours of spreadsheet analysis, not a single tool or piece of test equipment. What we found was that the losses began the same week a neighboring business installed a high-power wireless security camera system. The camera base station was mounted on the wall directly opposite the machine bank, transmitting continuous RF energy across the frequency band used by the machine control buses. The losses were not caused by machine failure. They were caused by a change in the electromagnetic environment that no one had considered. Fixing unexplained losses in gaming equipment is a process of elimination. Here is the step-by-step method I use.
Step 1: Define the Loss Precisely
Before you attempt any fix, you need to know exactly what you are fixing. “Revenue is down” is not precise enough. You need to answer these questions with data, not impressions:
Which specific machines are underperforming? Not “the fish tables” — list each machine by its identifier number and its individual revenue trend. When did the loss begin? Find the exact week or day when the revenue trend line for each affected machine diverges from its historical baseline. Is the loss constant or intermittent? A machine that loses 20 percent every day is affected by a different category of problem than a machine that loses 40 percent on Tuesdays and Thursdays but performs normally the rest of the week. Does the loss affect revenue per credit or total credits played? If revenue per credit has dropped, the machine is paying out more than it should. If total credits played has dropped, the machine is attracting fewer players or shorter sessions.
Answer these four questions with spreadsheet analysis before you pick up a single tool. The answers will point you toward the correct category of cause and save you from investigating directions that the data has already ruled out. I estimate that half of the time I spend on venue audits is spent on this first step alone, and it is the step that most consistently produces the breakthrough insight.
Step 2: Rule Out Operational Factors
Before investigating technical causes, eliminate the possibility that the loss is caused by changes in how the venue operates. These factors are easy to check and often overlooked.
Check whether the machine physical location changed. A machine moved from a high-traffic aisle to a corner will see fewer players regardless of its technical condition. Check whether the pricing or credit value was adjusted. A change from one dollar per credit to seventy-five cents per credit changes the revenue accounting but not the underlying machine performance. Check whether the machine was taken offline for maintenance or repairs during the affected period. Downtime reduces total revenue without indicating any machine problem. Check whether staff schedules or collection procedures changed. A new cash collector who handles the counting differently can create an apparent revenue drop that is actually a reporting artifact.
If any of these operational factors changed at the same time the revenue decline began, correct the operational issue and re-measure. If the revenue recovers, the problem was operational. If the decline persists after operational factors are normalized, proceed to technical investigation.
Step 3: Run a Controlled Comparison Test
This is the single most diagnostic test you can perform, and most operators never think of it. Take one underperforming machine and one healthy machine of the same model from your venue. Swap their physical locations. Run them for one week in the swapped positions. Then compare the results.
If the problem follows the machine — the previously underperforming machine still underperforms in its new location, and the previously healthy machine still performs well — the problem is inside the machine: aging components, a configuration error, or a modification that moves with the hardware. If the problem stays with the location — the previously healthy machine now underperforms in the new location, and the previously underperforming machine performs normally in the healthy location — the problem is environmental: RF interference, power quality, or physical access issues affecting that specific location.
This test takes one week and definitively splits the investigation into two completely different paths. Environmental problems require RF scanning and power quality analysis. Machine-internal problems require component-level inspection and configuration auditing. Without this test, you are guessing which path to investigate. With it, you know.
Step 4: Investigate the Identified Category
If the problem stayed with the location, your next steps are environmental. Conduct an RF spectrum scan of the affected area, comparing against a baseline scan from an unaffected area of the venue. Check the power quality on the electrical circuit feeding the affected location. Inspect the physical wiring, connector panels, and cable routing for anything unusual. Look for new equipment installed near the affected location — wireless devices, electrical appliances, lighting systems, or anything that emits electromagnetic energy.
If the problem followed the machine, your next steps are component-level. Open the machine cabinet and visually inspect the mainboard for bulging capacitors, heat discoloration, or corrosion. Measure the power supply output voltages against the manufacturer specifications. Audit every configuration parameter against the documented standard settings. Check the communication bus connectors for bent pins, corrosion, or loose contacts. Compare the machine internal component condition against an identical healthy machine. Replace any components that show visible degradation and re-test.
In either case, document every finding. Take photos. Record measurements. Keep a log of what you tested and what you found. This documentation serves two purposes: it prevents you from re-testing the same things later, and it provides evidence if you need to file an insurance claim or police report.
Step 5: Implement the Fix and Verify
Once you have identified the cause, implement the appropriate fix. For environmental problems, this typically means: relocating the machine away from the interference source, installing external RF filtering or power conditioning hardware, or relocating or shielding the source of the interference. For machine-internal problems, this means: replacing degraded components, correcting configuration errors, or installing external protection hardware to filter bus-level attacks.
After implementing the fix, monitor the machine revenue for at least two weeks before declaring the problem solved. Revenue recovery may not be immediate. It can take days for the machine statistical profile to stabilize after a fix is applied. Compare the post-fix revenue data against the pre-loss baseline, not against the loss-period data. The goal is to restore the machine to its historical normal performance, not just to see an improvement over the worst period.
If revenue does not recover within two weeks, the fix was incomplete or did not address the root cause. Return to the controlled comparison test in Step 3 and verify that the problem categorization was correct. The most common failure mode I see at this stage is implementing a fix for one cause while a second cause continues to operate undetected. Multiple simultaneous causes are the rule, not the exception, in persistent revenue loss cases.
Step 6: Install Preventive Protection
Once the immediate loss is fixed, install measures to prevent recurrence. External hardware protection devices on each machine filter future signal injection attempts. Independent physical counters prevent future reporting manipulation. Regular RF audits and configuration audits catch new problems before they compound into significant losses. A monthly data review cycle ensures that any new revenue pattern anomalies are detected within 30 days, not eight months.
Unexplained losses that recur are worse than the initial loss. They signal to anyone watching that the venue does not maintain ongoing security measures, making it a softer target. The protection you install after fixing the current problem is an investment in not having to fix the same problem again next year.
Frequently Asked Questions
How long does the full six-step process take? Steps 1 and 2 can be completed in a few hours with access to your machine data. Step 3 takes one week because you need to run the machines in swapped positions long enough to collect statistically meaningful data. Steps 4 and 5 depend on what you find — replacing a power supply takes an hour, while tracking down an intermittent RF interference source can take several days. Step 6 is ongoing. Most operators can complete the full investigation and implement the fix within two to three weeks.
What if I complete all six steps and still have not found the cause? This happens in roughly 10 percent of cases in my experience. The remaining possibilities are: the problem is intermittent and did not occur during your monitoring windows, multiple interacting causes are masking each other, or the loss is actually caused by a market shift that masquerades as a technical problem. In these cases, bring in a professional auditor with specialized equipment and broader experience. Some problems require tools and pattern recognition skills that come only from investigating hundreds of venues.
Can I skip the controlled comparison test if I am confident I know the cause? I strongly advise against skipping it. I have been wrong about the cause category more times than I would like to admit, and the swap test corrected my assumption before I spent time and money investigating the wrong path. The test costs a week of suboptimal machine placement and definitively answers the most important question in the investigation. Skipping it to save time often results in spending more time overall.
What is the single most common root cause you find? Environmental RF interference, discovered in approximately 40 percent of the audits I perform. It is common because it is invisible, because operators do not have the tools to detect it, and because new RF sources appear constantly in urban environments. A venue that was RF-quiet when it opened may have accumulated half a dozen interference sources within two years. Regular RF audits catch these before they cause unexplained losses.
Unexplained losses in gaming equipment almost always have an explanation. The explanation is discoverable if you investigate systematically rather than trying random fixes. Follow the steps above, document what you find, and you will either solve the problem yourself or have a detailed diagnostic record that enables a professional to solve it quickly. Contact us if you need help with any step of the process.