The battery clip may not making contact with the battery.
In order to fix this problem, start by removing the battery cover underneath the front of the starpointer. You will see a clip as seen in the picture below.

Remove the battery.
Bend the contact slightly towards the body of the starpointer (where the battery was) to improve the contact . Re-insert the battery.
This starpointer is the #51630 model and is on these Celestron scopes:
22093 | Costco NexStar 102GT |
21036-WM | Wal-Mart PowerSeeker 70AZ |
21056-K | Kohl’s PowerSeeker 114AZ |
11049 | NexStar 4SE |
11036 | NexStar 5SE |
11068 | NexStar 6SE |
11069 | NexStar 8SE |
22087 | NexStar 90SLT |
22097 | NexStar 127SLT |
22096 | NexStar 102SLT |
31145 | NexStar 130SLT |
22089 | SkyProdigy 70 |
22091 | SkyProdigy 90 |
31153 | SkyProdigy 130 |
22090 | SkyProdigy 102 |
11076 | SkyProdigy 6 |