Arena (Gottlieb, 1987): faults and System 80B replacement boards

Q: My displays are dead.

Tin and repin the MPU to display ribbon cable at both ends. A replacement MPU GottFA80_Plus Light or Lisy80 makes the interface reliable.

June 25, 2026

Is your Gottlieb Arena showing dead displays, releasing a ball at power-on, suffering from a multiball that no longer works or resetting itself? These symptoms are typical of Gottlieb System 80B pinball machines, whose original boards (MPU, Driver, power supply, sound) are now more than 40 years old. Good news: modern replacement boards, Plug & Play and battery-free, give your machine a second life.

Arena (Gottlieb, 1987): overview

Released in 1987, Arena is a System 80B pinball machine with a futuristic gladiator combat theme and multiball. It features the alphanumeric displays characteristic of the series.

Manufacturer: D. Gottlieb & Co.
Year: 1987
Electronic system: Gottlieb System 80B
Type: solid state pinball machine, multiball
Theme: futuristic combat / gladiators

Gottlieb System 80B boards — Arena — The Gottlieb System 80B CPU and Driver boards.

Common faults (System 80B)

System 80B machines use alphanumeric displays and an MPU with a battery-backed RAM 5101. Recurring faults: leaking battery on the MPU (corrosion and loss of the 5101 memory), unstable power supply (the original trim pot struggles to hold 5 V and 12 V), cracked solder joints (notably on the CPU daughter card), inter-board connectors to repin, poor grounds (ground mods are essential), blank displays if a single bit fails to pass from the MPU to the display, and startup disrupted by the backbox fluorescent tube starter.

Issues specific to Arena (forum feedback)

Dead displays: every connection of the MPU→display ribbon cable must be perfect; tin the edge connectors of the display and the MPU, repin both ends of the ribbon cable.
Ball released into the lane at power-on: prevents a valid start condition as long as this fault persists.
Multiball that does not work: usually a trough problem; adjust the trough switches to make them reliable.
Temperamental switches or coils: broken/missing pulldown resistor on a transistor under the playfield.
Faulty lamp board and sound board: combined faults reported on Arena.

Battery corrosion on a Gottlieb System 80B board — Arena — Typical corrosion from a leaking battery on System 80B: neutralize it first.

Replacement boards compatible with Arena

GottFA80_Plus (Light) — all-in-one board CPU + Driver + power supply, without sound.
GottFA80_Plus (Full) — same with integrated sound board (80B audio limited to a few titles).
Gosof — replacement sound board for System 80 and 80A (80B support currently limited to a few titles).
Godri80 — replacement Driver board.
Lisy80 — CPU board + web diagnostics.
GoPOP80 — bumper driver board (MA-922).

GottFA80_Plus board for Gottlieb System 80B — Arena — The GottFA80_Plus: all-in-one board (CPU + Driver + power supply), battery-free.

System 80B specifics: favour the GottFA80_Plus Light — the 80B is covered on the CPU/MPU side. On the audio side, support is for now limited to a few titles (Bounty Hunter, Chicago Cubs Triple Play, Tag Team); for other System 80B machines, keep and repair the original sound board and contact us (an audio solution is in preparation).

Plug & Play installation, battery-free, tutorials and free support. Contact us.

FAQ — Arena Gottlieb

My displays are dead.
Tin and repin the MPU→display ribbon cable at both ends. A replacement MPU (GottFA80_Plus Light, Lisy80) makes the interface reliable.

A ball drops into the lane as soon as the machine is powered on.
The game does not validate the start. Check the trough switches and the driving; a new Driver board makes the coils reliable.

The multiball will not launch.
Adjust the trough switches. A replacement MPU makes their reading reliable.

And what about the 80B sound?
Audio support is for now limited to a few titles (Bounty Hunter, Chicago Cubs Triple Play, Tag Team). For Arena, keep and repair the original sound board and contact us; a solution is in preparation.

How long does it take to install a replacement board?
Installation is Plug & Play: a few minutes, no soldering, with tutorials and free support.

Does a battery-free board keep the settings and high scores?
Yes. Modern replacement boards use non-volatile memory: no more battery, no more corrosion, and the settings are kept when powered off.

Step-by-step diagnosis

Power off, visual inspection: look for any battery trace or corrosion on your Arena's MPU; remove the NiCad battery if still present.
Power supply: measure the 5 V and check it reaches the MPU (re-solder the regulator or Q1 if the voltage drops).
Grounds: apply the "ground mods" between the boards (CPU, Driver, power supply, sound).
Connectors: re-pin the oxidized Molex connectors, especially the MPU↔Driver link.
Displays: never connect or disconnect a display while powered on; test with a known-good display.
Final test: check startup, credits, coils and displays; if needed, contact free support.