Celestron NexStar 8i (600 x 203mm) Telescope Logo

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Anonymous Posted on Nov 21, 2017

Celestron Nexstar 4GT - only responds intermittently to direction keys

Telescope has not been used for a very long time (new batteries). It only responds intermittently to the direction keys on the hand control (version 101.0). The alignment, when it responded to hand control) would slew to maximum but not lock onto any star. The telescope would then not respond to undo key (appears to lock up).

3 Related Answers

Anonymous

  • 1 Answer
  • Posted on Nov 21, 2008

SOURCE: 2-star alignment

I also have an 8i, but decided not to upgrade the controls yet. I've had my scope for about four years. I have experienced the same problem and am not sure what what causes it. Some nights, the scope tracks alignment all night, other times it does not. When the later occurs, the only thing that helps is to repeat the alignment picking new targets. One night, I had to repeat alignment 3-4 times. Also, I highly recommend a book by Michael Swanson, "The Nexstar User's Guide". It's an easy read, very specific and keeps the novice in mind. It should be included with every Nexstar sold. Go online to: http://www.Nexstarsite.com. Hope this helps. John

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Joe L

Joe Lalumia aka TelescopeMan

  • 3186 Answers
  • Posted on Dec 31, 2009

SOURCE: Celestron Nexstar 114gt telescope,hand controller lights up only

Do you have a fresh set of batteries in the scope? Better to use an outside 12 volt power pack with the Celestron 12 volt "cigarette" lighter cable.

This can be three things:

Low power

Bad cable from hand controller to scope.

Or a broken hand controller

Try fresh batteries first.

Joe L

Joe Lalumia aka TelescopeMan

  • 3186 Answers
  • Posted on Feb 14, 2011

SOURCE: CG5 is brand new-not 30days old yet. Mount slews

You should return the scope under warranty-- however a bad power supply-- and or a bad hand controller cable can cause these symptoms called a "runaway slew".

Get a separate 12 volt power supply and the proper cigarette lighter style power plug.

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Related Questions:

1helpful
1answer

Nexstar 4GT

This is said by Celestron to cover the 4GT with minor differences
http://www.tasco.com/products/manuals/Tasco56TN-57TN-301051N-301004N-301005N.pdf

There are also some firmware upgrades available on the Celestron website
http://www.celestron.com/astronomy/celestron-nexstar-4gt-computerized-telescope.html
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I have connected the hand held remote control to me Celestron NexStar 80GTL and nothing happens. The remote will not power up. Don't know if the problem lies with the remote or is a more major...

Are the batteries fresh? You can also try a new hand controller cable maybe the one you have is broken which is a common problem.

Beyond that you can try to borrow another hand controller and try it. If none of these work, then you have a blown circuit inside the telescope. It will need to be returned to Celestron for repairs.
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Looking for a replacement focuser for a Celestron NexStar 130 SLT.Would like it to be 1.25 with 2in capibilty with fine focus dial

Either contact Celestron directly-- or look here--

http://www.telescope.com/control/accessories/telescope-focusers
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The hand control isn't working properly. Haven't used the telescope for 12 months. I have replaced the batteries. When I try to align to a star or other object, the direction buttons only work in one...

First thing to do is to buy a new hand controller cable from Meade, If this does not correct the problem then either the hand controller is defective, or something is broken inside the scope.

Cables are not expensive, call Celestron:

http://www.celestron.com/c3/page.php?PageID=37
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I dont understand how to start and use my nexstar 4 SE computerized telescope

Basically, enter Time, Date, and Site-- level the tripod and do a 2 or 3 star alignment.

All of the manuals are on the Celestron web site here--

http://www.celestron.com/c3/downloads.php
1helpful
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New batteries put in....It doesn't power up

Are you SURE you installed the batteries correctly? I once installed them with ONE battery reversed. !

Jiggle the cable to the hand controller, you might just have a bad cable. You can buy a new one from Celestron.

If you can get a 12 volt power pack and the proper power cable or the 110 volt power pack-- try it on direct power. If this is a new scope I would return it to the deal if these simple fixes do not work.
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1answer

Celestron Nexstar 114gt telescope,hand controller lights up only

Do you have a fresh set of batteries in the scope? Better to use an outside 12 volt power pack with the Celestron 12 volt "cigarette" lighter cable.

This can be three things:

Low power

Bad cable from hand controller to scope.

Or a broken hand controller

Try fresh batteries first.
0helpful
1answer

I have a celestron nexstar 5 the begins to move on it own

Many times a bad cable will cause this. Also low batteries can cause this.

Contact Celestron and order a new cable. Use an external 12 volt power pack.

http://www.celestron.com/c3/page.php?PageID=37
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