After shipment Guidelines for Vintage Electronic  Equipment   ~2019
Purpose:
There are some "common"  issues that appear after shipping electronic equipment.
This article attempts to addresses some ways to avoid and or remedy those issues.


Addressing issues that may arise after shipping equipment.
Shipping of electronics can cause some issues that are readily solvable.
Sometimes there are issues with the new  environment that can cause issues.

1. Inspect unit for any fasteners that may have come loose.

2. If available one may wish to run the unit up on a variac and monitor the equipment for shorts or no continuity.

3. Hums: Try a different cable or different input. Hums may become an issue due to vibration that unseat connectors.
Connectors can migrate after years of thermal cycling which can be antagonized further by shipping vibration.
Opening the cover and making certain all connectors are properly seated is a first step. As a follow up using a contact cleaner
preferably a de-oxit product may remedy the issue.  Experience tells us to always check to see if the cleaner you are using is safe for the plastics of your connectors.

Other causes can be the grounding characteristics of your installation. Proper grounding is  quite an involved subject beyond the
scope of this simple guide but google will readily link you to a host of information on proper practices.

Sometimes ground straps, jacks  and terminals become loose necessitating them to be re-tightened.


4. Noisy controls.    A noisy control may not be a noisy control.
Shipping can dislodge the dust of ages and cause potentiometers to become noisy.
Sometimes one can remove the knob and spray a cleaner down the shaft but it is preferable to spray
a proper cleaner... preferably de-oxit... through the vent hole in the control which entails opening the unit.
If in doubt check that the cleaner you use is safe for the controls of your unit.
As a for instance some Fender amps have potentiometers that their insides can crumble when sprayed with some contact cleaners.

A noisy control may not be a noisy control.
It may be a cold solder joint or a connector in the path that is not making proper contact.
We have seen volume controls make scratching noise that we have cleaned to continue to make scratchy noises
only to be cleared up by cleaning  connectors. 1/4" phone plugs are particularly susceptible to this issue.
A shot of cleaner on the plug or burnishing of the jack with a proper tool is in order. Always follow proper service protocol.
If you don't know what that is you should probably have a trusted service organization perform  the service as that one
can do more damage than good if one works on the unit while power is available to the chassis or one
sheds metal bits into the inside from a burnishing tool.

~ end