Banner with image links showing border

[Mgauf]

Hello all.

New to the forum. I am old school website designer from the 1990s and 2000s. BBEdit. Code everything from a blank page, etc.
I have a banner that I cut into 4 separate pieces, 3 of which are links. I can't seem to get rid of the hairline border around each of the cells housing those images.the borders appear in Safari, Firefox and Chrome. Here's the code:
<table border="0" width="725">
<tr>
<td><img src="images/HmPgLogo.jpg" alt="Painted Axe Logo" width="216" height="106" border="0"></td>
<td><img src="images/GalleryBut.jpg" alt="Painted Axe Gallery" width="181" height="106" border="0"></td>
<td>
<a href="#About"><img src="images/AboutBut.jpg" alt="Painted Axe About" width="145" height="106" border="0"></a>
</td>
<td>
<a href="#Contact"><img src="images/ContactBut.jpg" alt="Painted Axe Contact" width="181" height="106" border="0"></a>
</td>
</tr>
</table>

I've also attached a pic of the banner. Any help would be greatly appreciated. Thanks in advance.