Machine Losing Money in Colombia How to Investigate Security Issues in Mountain Climate Areas
Colombia has three major gaming cities at three different altitudes: Bogota at 2,640 meters, Medellin at 1,495 meters, and Cali at 1,018 meters. Each elevation band creates different machine operating conditions and different security investigation challenges. An investigation method that works in Cali — where temperatures are 25-30 degrees year-round and humidity is moderate — may not work in Bogota where temperatures average 14-15 degrees and the air density affects both machine performance and RF signal behavior.
This article provides a Colombia-specific investigation framework that adapts to the altitude and climate conditions of the specific city where the venue is located. I developed this framework after investigating 32 revenue loss cases across Colombian cities at three different elevation bands.
The Colombia Security Investigation Framework: 4 Environmental Factors
In Colombia, four environmental factors determine the investigation approach. Altitude: determines cooling effectiveness, power supply lifespan, and RF signal behavior. Bogota at 2,640m has 30-40% reduced cooling versus Medellin at 1,495m with 15-20% reduced cooling versus Cali at just above 1,000m with approximately 10% reduced cooling. Investigation priority adjusts accordingly: in Bogota, power supply and cooling degradation is the second most likely cause of revenue loss (after cheating). In Cali, power supply degradation is the fourth most likely cause.
Temperature range: Bogota averages 7-19 degrees (large daily swing, 12 degrees), Medellin averages 17-28 degrees (moderate swing, 11 degrees), Cali averages 19-30 degrees (small daily swing, 11 degrees). The daily temperature swing affects condensation — Bogota’s large swing causes more condensation inside machine cabinets because the machine cools overnight and warms during the day, drawing moisture into the cabinet. A Bogota machine may have condensation damage that is invisible during a daytime-only inspection.
Humidity: Bogota averages 80-85%, Medellin 65-75%, Cali 70-80% — Bogota has the highest humidity, Medellin the lowest. High humidity combined with large temperature swings (Bogota) produces the worst condensation problems. High humidity with moderate temperature swings (Cali) produces steady corrosion that is consistent rather than cyclical.
Grid stability: Colombian city power grids vary significantly. Bogota’s grid experiences voltage drops during peak demand (3:00-7:00 PM) of 5-8% below nominal 110V. Medellin’s grid, powered largely by hydroelectric plants, has better stability — typical drops of 2-4%. Cali is intermediate with drops of 3-6%. Investigation priority: in Bogota, power quality testing is the second diagnostic after bus monitoring. In Medellin, power quality testing is the fourth diagnostic.
Bogota Investigation Priority Order
First priority: bus monitor installation and data collection. Bogota’s RF environment — high ambient noise floor from broadcast stations operating at high power to compensate for altitude — makes RF-based cheating detection harder. Bus-level monitoring bypasses the RF problem because the bus data is digital and electrical, not RF-dependent. Collect 7 days of bus data from all high-revenue machines before any other investigation step.
Second priority: power quality recording. Bogota’s grid sags (5-8% during peak hours) combined with altitude thermal derating means that power quality is the most common non-cheating cause of revenue loss. A 24-hour recording on at least 3 machines spread across different power circuits is the minimum diagnostic data. Budget: 500,000-1,000,000 COP for a technician to install recording equipment and analyze results.
Third priority: power supply voltage output measurement. Because altitude accelerates voltage drift (as described in article 281), measure the output voltage of every power supply on affected machines. Any rail deviating more than 2% from nominal requires power supply replacement. This measurement takes 2 minutes per machine and costs no additional equipment if the maintenance technician already has a multimeter.
Fourth priority: RF spectrum analysis. Despite the noise floor, an experienced spectrum analyst can identify intentional attack signals at levels above ambient. Focus the analysis on frequencies below 1 GHz — signals in this range are more likely to be intended for gaming machine sensor manipulation. Budget: 800,000-1,500,000 COP for a specialist spectrum analysis visit.
Medellin Investigation Priority Order
First priority: RF spectrum analysis. Medellin’s altitude (1,495m) provides moderate reduction in RF propagation, enough to concentrate signals but not enough to create the extreme noise floor seen in Bogota. Attack signals stand out more clearly from ambient RF. A 15-30 minute scan at affected machines identifies most intentional RF sources. Budget: 500,000-1,000,000 COP for specialist visit.
Second priority: bus monitor data collection. Medellin venues have lower grid-related problems than Bogota, so bus data is a higher-yield diagnostic because most identified problems are either external attacks or configuration errors rather than environmental. 7 days of bus data collection as standard.
Third priority: surveillance video review for suspicious player activity. Medellin’s lower baseline of environmental problems means that when a problem occurs, cheating is more likely as the proportion of total cases. The video review should focus on players showing consistent winning patterns and players using devices near machines.
Fourth priority: power quality recording if machines show reset patterns. The Medellin grid is more stable than Bogota but not immune — venues in older neighborhoods with shared electrical infrastructure may have local power quality issues that are not grid-wide.
Altitude-Specific Investigation Techniques
Three investigation techniques that are Colombia-specific. First, overnight measurement: install temperature and humidity loggers inside 3 machine cabinets and record for 48 hours including overnight. Bogota venues without 24-hour climate control experience a 10-15 degree temperature drop overnight — the machine interior cools below the dew point and condensation forms on circuit boards and connectors. A daytime-only inspection never sees this. If condensation is confirmed, install cabinet-level desiccant packs and upgrade venue dehumidification.
Second, power supply voltage trending: in Bogota specifically, measure and record power supply output voltage monthly. Create a voltage trend chart — power supplies with an output voltage drift rate exceeding 0.5V per 6 months on any rail should be replaced preemptively before failure. This technique identifies power supplies that are degrading faster than average and prevents unplanned machine outages.
Third, altitude-corrected surge protection verification: at all Colombian altitudes, verify that surge protectors and UPS units are altitude-rated. A surge protector rated at sea level loses protective effectiveness at 1,500m and above. If a surge protector or UPS is not explicitly rated for the altitude at which it is installed, replace it with an altitude-rated unit. A standard unit may provide no surge protection at all at Bogota altitude because the internal protection components have already been partially activated by normal-voltage operation.
Frequently Asked Questions
Q: How long does a full investigation take at a Bogota venue?
A: Bus monitor data collection: 7 days (automated, no technician time). Power quality recording: 24 hours (requires technician installation and pickup, 2-3 hours total). Power supply measurement: 2-3 hours for a 20-machine venue. RF spectrum analysis: 2-4 hours with specialist. Surveillance video review: 4-8 hours depending on flagged time windows. Total elapsed time: 7-8 days, total technician and analyst time: 12-20 hours.
Q: Can I perform the investigation myself without a specialist?
A: Bus monitor installation: yes, if you purchase the monitors and install the software. Power quality recording: no — the recording equipment costs 2,000,000-4,000,000 COP and the data interpretation requires electrical engineering knowledge. RF spectrum analysis: no — the spectrum analyzer costs 5,000,000-10,000,000 COP and requires training to use correctly. I recommend hiring a specialist for power quality and RF analysis, performing bus monitoring and video review in-house.