Editing Sinclair ZX80 (section)

== General Maintenance ==
{| class="wikitable styled-table" style="width:70%; text-align:center;"
! Issue !! Cause !! Remedy
|-
| Unstable picture / snow || Ageing electrolytic C5 (47 µF) on video rail || Replace with low-ESR 105 °C part
|-
| Reboots when touched || Loose 7805 regulator tab shorts to case || Insulate tab / fit TO-220 spacer
|-
| RAM pack “wobble” resets || Leverage on edge bus ⇒ poor contact || Fit retention bracket or right-angle header
|-
| Overheating || No ventilation slots (black “stripes” are cosmetic) || Drill discreet vents or run uncased board
|}

Full recapping, regulator heatsinking and replacement of the brittle membrane keyboard are popular reliability upgrades.