Cleopatra (Gottlieb, 1977): faults and System 1 replacement boards
Your Cleopatra (Gottlieb, 1977) shows “Game Over” as soon as you power it on, the coin-door buttons no longer respond or the displays stay dark? As Gottlieb's first solid-state pinball, the Cleopatra launched the famous — and temperamental — System 1. Here are the typical faults reported on the forums and the battery-free replacement solutions.
Cleopatra overview
Released in 1977, the Cleopatra is Gottlieb's very first electronic (solid-state) pinball and the flagship of System 1. Its theme features ancient Egypt and Queen Cleopatra.
- Manufacturer: Gottlieb
- Year: 1977
- System: Gottlieb System 1
- Type: Solid-state (alphanumeric displays)
- Theme: ancient Egypt, Cleopatra
Common faults (System 1)
The Gottlieb System 1 shares a set of well-known weaknesses, regardless of the game:
- Leaking battery: the NiCad battery soldered onto the MPU board leaks over time and corrodes traces and components. It's fault No. 1 — remove it without delay.
- Poor grounds: the original ground wiring is undersized and causes resets and erratic behaviour (the “ground mods” are almost mandatory).
- Corroded connectors: the Molex connectors, especially the MPU↔Driver link (46 pins), lose contact and require re-pinning.
- Power supply: unstable 5 V, tired rectifier bridges and an overheating transformer lead to crashes.
- Displays: digits that fade, flicker or stay frozen at zero.
Problems specific to Cleopatra (forums)
- “Game Over” at start-up: a game-over relay that doesn't pull in is a Cleopatra System 1 classic, often due to a bad contact or a fault in the boot sequence.
- Inoperative door buttons: adding credits, start button and test button with no effect, frequently after replacing components or because of a faulty connector.
- Stubborn displays: dark or unreadable segments, typical of System 1 electronics.
- Temperamental boot sequence: the very tight tolerances of the reset stage make the boot sensitive to the slightest voltage drop.
- Battery-related corrosion: damage around the old battery in the MPU area, to be inspected as a priority.
Step-by-step diagnosis (System 1)
A simple method to get a Cleopatra running again:
- Powered off, visual inspection: open the head and look for any trace of battery (green or white corrosion) on the MPU board; if a NiCad battery is still soldered, remove it immediately.
- Power supply: measure the 5 V at the regulator output and check that it actually reaches the MPU; if the voltage drops, resolder the legs of transistor Q1.
- Grounds: apply the “ground mods” (ground wires between CPU, Driver, power supply and sound).
- Connectors: re-pin the oxidised Molex connectors, first of all the MPU↔Driver link (46 pins).
- Displays: never connect or disconnect a display while powered on; test with a known-good display to isolate the fault.
- Final test: power back on and check start-up, credits, coils and displays. If in doubt, contact our free support.
Replacement boards compatible with Cleopatra
The Cleopatra is based on the Gottlieb System 1, a platform known to be fragile (leaking battery, weak grounds, oxidised connectors). Pinballs Store offers battery-free replacement solutions to make it reliable:
- Gosof — replacement sound board.
For a CPU/Driver board dedicated to System 1, contact us: we'll point you to the best solution for your Cleopatra. Plug & Play installation, battery-free, free support.
FAQ — Cleopatra Gottlieb
What year was the Cleopatra released?
In 1977. It's Gottlieb's first solid-state pinball and the launch of the System 1 platform.
Why does my Cleopatra permanently show “Game Over”?
It's a classic System 1 fault, often linked to the boot sequence, a faulty connector or the grounds. Cleaning and re-pinning the connectors, along with the ground mods, fix a large share of cases.
Should I remove the battery from the MPU board?
Yes, immediately. The original NiCad battery eventually leaks and destroys the board. A battery-free replacement board eliminates this risk for good.
Is there a replacement board for the Cleopatra?
Yes. Contact us for the right System 1 CPU/Driver solution; installation is Plug & Play, battery-free, with free support.
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.
Useful guides
- How much does pinball repair cost? The price guide
- How much is my pinball worth? Value and estimate
- Pinball leg sizes: the guide by machine
- Pinball electronics explained: MPU, driver, power supply, sound
See also
Other Gottlieb System 1 pinballs and their faults:
- Sinbad (Gottlieb, 1978)
- Joker Poker (Gottlieb, 1978)
- Dragon (Gottlieb, 1978)
- Solar Ride (Gottlieb, 1979)
