PFC Private RallyPoint Member 1447797 <div class="images-v2-count-0"></div>I've changed the hub batteries and put in the freq... For an RT1523A or an RT1523D when you key the mic why would the screen be saying off? 2016-04-12T10:24:59-04:00 PFC Private RallyPoint Member 1447797 <div class="images-v2-count-0"></div>I've changed the hub batteries and put in the freq... For an RT1523A or an RT1523D when you key the mic why would the screen be saying off? 2016-04-12T10:24:59-04:00 2016-04-12T10:24:59-04:00 SSG Ed Mikus 1447823 <div class="images-v2-count-0"></div><a class="dark-link bold-link" role="profile-hover" data-qtip-container="body" data-id="808696" data-source-page-controller="question_response_contents" href="/profiles/808696-25u-signal-support-systems-specialist-115th-csh-1st-med-bde">PFC Private RallyPoint Member</a> did you look on AKO and MilSute for information? Response by SSG Ed Mikus made Apr 12 at 2016 10:29 AM 2016-04-12T10:29:52-04:00 2016-04-12T10:29:52-04:00 SGT Ben Keen 1447960 <div class="images-v2-count-0"></div><a class="dark-link bold-link" role="profile-hover" data-qtip-container="body" data-id="808696" data-source-page-controller="question_response_contents" href="/profiles/808696-25u-signal-support-systems-specialist-115th-csh-1st-med-bde">PFC Private RallyPoint Member</a> - I've edited your discussion a little in attempt to get you a faster answer. Response by SGT Ben Keen made Apr 12 at 2016 11:01 AM 2016-04-12T11:01:37-04:00 2016-04-12T11:01:37-04:00 SSG Private RallyPoint Member 1448281 <div class="images-v2-count-0"></div>Have you tried a different mic? Just an idea. Of course for some odd reason the power could be getting pulled. Does the screen go off when you do anything else? Response by SSG Private RallyPoint Member made Apr 12 at 2016 12:21 PM 2016-04-12T12:21:55-04:00 2016-04-12T12:21:55-04:00 SGM Private RallyPoint Member 1448326 <div class="images-v2-count-0"></div>As stated below check the mic, look inside the connector to see if the mic has four pins or five. You would want to use the one that have five pins. If you are using an amp make sure the antenna connections are clear and that is properly seated. Run a self test on the radio to see if you get any fail codes Response by SGM Private RallyPoint Member made Apr 12 at 2016 12:36 PM 2016-04-12T12:36:25-04:00 2016-04-12T12:36:25-04:00 MSG Private RallyPoint Member 1449074 <div class="images-v2-count-0"></div>Check the DATA Mode. I believe that you are seeing that the Data rate is set to off. (Set the FN switch to LD and press the 4(DATA) key to scroll through the data options.)<br /><br />That said, you should not see the data setting by pressing the PTT, so the indication is, I think, what you have guessed, an internal card fault. It would be interesting to see if you set the data rate to something else if that becomes the display message when you key.<br /><br />(And good for you knowing that we 25Us are not authorized to open the case.) Response by MSG Private RallyPoint Member made Apr 12 at 2016 4:31 PM 2016-04-12T16:31:36-04:00 2016-04-12T16:31:36-04:00 1LT Private RallyPoint Member 1451922 <div class="images-v2-count-0"></div>Not sure if this will fully answer your question, but I believe I can provide some insight on why your display is reading "off". This is because the data mode of your radio has been set to the "off" setting. This can be referenced in the bottom two cells of the table on page 5-32 of TM11-5820-890-10-8. I hope this answer is helpful, and that you are not experiencing any further issues. Response by 1LT Private RallyPoint Member made Apr 13 at 2016 4:50 PM 2016-04-13T16:50:39-04:00 2016-04-13T16:50:39-04:00 2016-04-12T10:24:59-04:00