Thanks to lmofle for getting me started.  
These are just some improvements I made.

Capo on 1st fret

Intro:
D G A D

              D             G
When this old world gets me down
            A              D      A
And life's a chain I drag around
             D             G
When I can't find a ray of hope
           A                 D      A
To help me soothe my worried soul


Chorus:
     D            G
Only you and you alone
             A                  D      A
Can turn the darkest night into dawn
         D                  G
The only reason for hanging on
   A            D
Is you and you alone


Instrumental:
A D

        D            G
Holding you close to me
        A                   D      A
Gives me all the strength I need
            D              G
Then I wake up it's just a dream
            A            D      A
All that's left are memories


Chorus:
        D            G
Of only you and you alone
             A                  D      A
Can turn the darkest night into dawn
         D                  G
The only reason for hanging on
   A            D      A
Is you and you alone

        D                  G
My only reason for hanging on
   A                  D
Is you and you alone