checkbox & radio button rendering issue

I have them in a .pdf, but this site won't let doesn't seem to have any way to upload. All that shows is the text. I can modify the font, etc., but the checkboxes still don't show, so it's not a font problem. They show perfectly in IE 11. I can show pages from other sites, e.g., w3schools.com, and the checkboxes display OK, so it has to be something with my site but I'll be darned if I can see anything. The page is as simple as I can make it. Code follows:
<pre lang="HTML">
@{
ViewBag.Title = "ProductSearch";
}
@{ Layout = "~/Views/Shared/_left-sidebar.cshtml";}

<form id="fSearch">

Product Search

<p>Please enter your search parameters and check the constructed statement at the bottom, then click on the Search link.</p>
<label for="fKeyword">Keyword: </label>
<input type="text" name="fKeyword" Size="100" />

<br /><br />

Category (Check all that apply. Leave blank for all-inclusive search.)

<input type="checkbox" name="electronics" value="Electronics">Electronics<br />
<input type="checkbox" name="clothing" value="Clothing">Clothing<br />
<input type="checkbox" name="furnishing" value="Furnishing">Furnishing<br />
<input type="checkbox" name="tools" value="Tools">Tools<br />
<input type="checkbox" name="automotive" value="Automotive">Automotive<br />
<input type="checkbox" name="insurance" value="Insurance">Insurance<br />
<input type="checkbox" name="financial" value="Financial">Financial<br />
<input type="checkbox" name="jewelry" value="Jewelry">Jewelry<br />

<br />

Range for search

<input type="radio" name="range" value="club">My Club<br>
<input type="radio" name="range" value="metro">Metro Area<br />
<input type="radio" name="range" value="district">My District<br />
<input type="radio" name="range" value="state">My State<br />
<input type="radio" name="range" value="country">My Country<br />
<input type="radio" name="range" value="world">The World<br />

<br />

I am searching to find:

<input type="radio" name="use" value="personal">Products/services to purchase personally<br>
<input type="radio" name="use" value="business">Establishing a business connection<br />
<input type="radio" name="use" value="provision">Provisioning a Rotary project<br />
<label for="fUse">Other: </label>
<input type="text" name="fUse" Size="50" value="@Request.Form["fUse"]" />

<br /><br />
<!-- <textarea rows="1" cols="70" name="fTranslation">I'm searching for</textarea> -->

<input type="submit" value="Search">
</form>


</pre>