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Also worth mentioning, both of the cards that arent turning on are on the same side of the router. 
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Also worth mentioning, both of the cards that arent turning on are on the same side of the router.

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You probably need to turn on the card services for the router to recognize the cards with the controller t1 0 0 command and the timeslots commands.
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You probably need to turn on the card services for the router to recognize the cards with the controller t1 0 0 command and the timeslots commands.

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Not familiar with doing that.. how would I go about doing that?
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Not familiar with doing that.. how would I go about doing that?

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I figured it out without any help from the experts.
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I figured it out without any help from the experts.

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I have 4 csu/dsu cards connected to T-1 lines in a cisco 3640 router. One of the cards appeared to have gone bad. So I swapped out the card then I had no light on the new card. I rebooted the router and then only two of the cards came back up. The new card plus one other one wouldnt come up. Neither of the cards that dont have lights show up in the running config, I also cant check the interface out at all its like they dont exist. Any idea would be appreciated 
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I have 4 csu/dsu cards connected to T-1 lines in a cisco 3640 router. One of the cards appeared to have gone bad. So I swapped out the card then I had no light on the new card. I rebooted the router and then only two of the cards came back up. The new card plus one other one wouldnt come up. Neither of the cards that dont have lights show up in the running config, I also cant check the interface out at all its like they dont exist. Any idea would be appreciated 

Need some help with a cisco 3640 router with multiple csu/dsu cards installed

A router is a networking device that forwards data packets between computer networks. Routers perform the "traffic directing" functions on the Internet. The most familiar type of routers are home and small office cable or DSL routers that simply pass data, such as web pages, email, IM, and videos between computers and the Internet. More sophisticated routers, such as enterprise routers, connect large business or ISP networks up to the powerful core routers that forward data at high speed along the optical fiber lines of the Internet backbone. Though routers are typically dedicated hardware devices, use of software-based routers has grown increasingly common.