Search around for a cave north of the Winterhold college. An imperial called Septimus Signus will give you a dwarven sphere and a dwarven cube.
You need to enter a Dwemer ruin and find a table-like device at the bottom. Your quest tracker will point you towards Alftand, but you might have already found one at Mzinchaleft or Raldbthar. The dwarven sphere will open a staircase leading down to an exit to Blackreach.
Follow your quest tracker to find the Tower of Mzark. At the top of this is the device the Dwemer used to transcribe the Elder Scroll. Place the Lexicon on the mounting, and press the third button until the lexicon opens up, the second button until the first button lights up, and the first to complete the process. Take the lexicon (which is part of Septimus' quest) and the Elder Scroll from the machine (which is needed for the main quest).
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More info;
This is for info on the place:
www.uesp.net/wiki/Oblivion:Temple_of_the_Ancestor_Moths
Info for the quest:
www.uesp.net/wiki/Oblivion:The_Ultimate_Heist
OR
you can use the cheat code ~coc testinghall go to the library
well if the puzzle is a claw puzzle like the golden claw just go in to your item look for the golden claw then inspect the item and look on the paw of the claw (hand) and there should be 3 symbols that match the symbols on the wall (puzzle)
But if you want the elder scroll the puzzle is put the cube in the left hand side then the next light on the left opens up then keep activating the button until the next blue light comes on and keep doing it until you get the elder scroll from the egg looking thing that comes down
The elder scroll is found during the mission Elder Knowledge in the Tower of Mzark. The only way to access the elder scroll is to begin working on the mission Discerning the Transmundane which is given during the quest line.
Press the pillar on the right, 2 buttons will light up. Press them so the other two buttons will light up. Press those until you will see a reflection. That's when you will
recieve the first elder scroll.
You have to go to Blackreach, the second to last step in "Elder Knowledge".
There are several Centurion along the road, but they can be avoided. Just take care of the Dwemer sphere and the falmer, and follow the cobblestone path southeast to a golden button encased on a Dwarven head pedestal. Press it, and the elevator behind lights up, allowing you to ascend and exit back outside. Open the gate, allowing you to enter from the Great Lift of Alftand. This is a large city with many enemies and things to loot. Remember to bring a pickaxe as there are many ores to mine. To continue the mission, follow the quest marker to the far southwest corner of the map. This will lead you to the Tower of Mzark, the place where the Scroll resides.
- Elder Scrolls Wiki (elderscrolls.wikia.com)