ok... first off do you have other items connected to the power rail – the Argo (go to MODE STATUS, ENTER, and see if it says EXT for external or
BATtery), fan, etc? And if so do any of these go out when the ServoCAT’s lights are out? If they do proceed – if they do not then the problem is inside the scope and not the
PGB system at the center of the rocker – i.e. the part that brings power in. It may be the power rail or just cabling.

Does it do it at a particular spot?

-check to be sure the cable in the center back of the ServoCAT, RCA/Phono plug, is plugged in firmly. Also check that it is plugged into the power
distribution rail inside the rocker.

-An intermittent or "resistive" switch in the power rail might cause this - move the ServoCAT power jack so that it is under a different switch.
This is more common with older PGB power rails (with old fashion metal bat switches).

If not these things than more than likely this is an improperly installed PGB system. When installed properly and maintained the system will never drop out (see
maintenance below).

Some of the things I have seen:

-There are 2 wires, splitting off from a cable inside the rocker floor - one goes into the hole where the pivot post is (under the encoder) and it
will be difficult to tell if it is loose - but put a little tension on it with everything powered up and see if you can make the system drop power.
There is also one that goes to the '-' terminal contact plate which is a stainless plate that is spring loaded...this one is obvious - see if it is
loose.
[Note: if you wiggle this one it might break the connection. This is not necessarily an indication of a problem as these dual contacts are spring loaded and
indeed if you lift the pair it will break contact.]

-next see if the negative terminal contact plate is properly put in place - grab it by the ends and lift up evenly, you should be able to get
1/8” -3/16" upward movement before it stops, no more. Lifting it WILL break the connection!
Then it should spring snap back down. Note that we've seen a number of these that were improperly installed – the 2 brushes (for redundancy) have to be
vertical to the floor - if one (or both)is (are) cocked or if they are not properly spaced it can hang up and not provide redundancy and lock up the plate which is designed to be free-floating. I've only seen this on bigger scopes - but I've seen and heard of it multiple times. One can remove brush contact plate ( be careful not to lose the spring/center screw!),
remove the 2 brushes and redrill these holes with a 25/64” drill bit to provide a small amount of ‘slop’ allowing any issues with them being too close/far apart
and/or not vertical to correct itself. This has been noted on several systems.
Reassemble these parts and check.

Now it gets a little more difficult ... you'll need to somehow lift the scope off the ground. One way to do this is to get some blocks (2x3 or 2x4 cut into
3" lengths – 8 of these for example) and put these under the body of the rocker at each corner - NOT the ground board feet. If using the 2x3's place one under one
corner of the scope, then another then the last then repeat with a second one to go a little higher - be careful you don't tip it over!!!!! This will
raise the scope enough to allow the ground board to hang down on the pivot post producing a gap between the top of the ground board and the bottom of
the rocker.

-there is a redundancy spring that fits over the pivot post (the post that goes up from the ground board and that the scope turns on)... if this is
missing you may get, over time, intermittent contact. This is hard to see but sometimes can be seen without taking it apart. Use a flash light and shine
it under the floor of the rocker, along the plane of the floor and into the gap between the rocker and the ground board - you should see the reflection from
the pivot post (shiny stainless steel) and if careful the "wrap" of the spring around it. If it is not there or you can't tell then you'll have to
remove the ground board to check for sure...but first...

-there is a plate at the center of the bottom of the ground board - this is where the pivot post attaches to the ground board. In the center of this
plate (not the outside edges) there are 2 screws. We recommend in our instructions that these be installed using loctite - those instructions are
often missed by installers. See if these screws are loose. If so that could very well be the problem. Also there is a cable that goes from the
connection foot connector to this plate. It connects to it and to a small plate with studs near it... the large pivot post plate is the '+' contact,
the smaller plate with studs is the '-' terminal plate. See if either of these are loose. When we build a ground board we put silicone (not caulk) on
these to prevent them from corroding and from coming loose.

Last if all else fails you need to remove the ground board and see if the spring is there. For smaller scopes you can remove the mirror box and turn
the rocker on its side. For larger ones you can possibly get your hand in there with a hex wrench to remove the 2 screws that hold the pivot post,
have the ground board "fall" onto your arm when the last thread is removed and then carefully remove the ground board... this is difficult and even
more so to get it back on - but I've done it a number of times and it can be done. We do have a separate document for removing the ground board –
please ask for it if you are going to go through this process.

[note the ‘spring’ was added in about late 2005 or early 2006 I believe... and I had faulty instructions on it as I had forgotten to tell people to
enlarge the whole in the ground board to allow the spring to do its thing – if that hole isn’t 1”, which it has to be – the spring could easily get hung
up and not do its proper contact (adding redundancy – as designed)]

MAINTENANCE:
-some things that might want to be inspected:
-you can remove the brush assembly, this is the plate that has the 2 screws/brushes and a center screw. Assuming you've checked the above items.
You can remove the connection wire, be careful the lug is not twisted. Then remove the center screw - be CAREFUL not to let this go - as it I spring
loaded! Keep this all together (you can use a wire tie on the bottom of that center screw so that the screw isn't propelled out by the spring). Inspect
the brushes. They should be clean at the bottom. Use fine sand paper to clean the ends if they are not. If the sides are not clean and possibly they
are causing them to stick in the brushes then clean this as well and if so you might want to remove the bushings in the floor and clean inside them.

-If you have removed the ground board you can inspect the top of the stainless contact plate. It is normal for a ring to be seen where the
brushes have been contacting it - but it should not be dirty. Clean if necessary.

-Make sure the pivot post, the main 3/4" diameter stainless steel post that goes up the center, is very clean - no oil or dirt. Use as a minimum soapy
water to clean it (this will clean off any oil residue from the inside of the bushing).

-clean the inside of the main bushing in the center of the floor of the rocker. Use soapy water - be sure it is CLEAN.?