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<blockquote data-quote="benhasajeep" data-source="post: 847694" data-attributes="member: 70649">To me it sounds like the batteries are gone.&nbsp; I have after market EN-EL3's for years now, though still have the Nikons too.&nbsp; About every 6 months I recharge all my batteries (been used or not) and pop off all my flash units 3-4 times to exercise the capictors.&nbsp; I would order a new pair. You can power the D300 with a 9v power adapter (like a computer one).&nbsp; The USB port does not supply enough voltage / power to run the camera.&nbsp; So you have to have a EH-5a power adapter.&nbsp; I have an after market one that was like $30.&nbsp; Don't use it often but does work.&nbsp; Needs to be 9v.Oh, Welcome to the site.&nbsp; <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink&nbsp; &nbsp; ;)" loading="lazy" data-shortname=";)" /></blockquote>

[QUOTE="benhasajeep, post: 847694, member: 70649"] To me it sounds like the batteries are gone. I have after market EN-EL3's for years now, though still have the Nikons too. About every 6 months I recharge all my batteries (been used or not) and pop off all my flash units 3-4 times to exercise the capictors. I would order a new pair. You can power the D300 with a 9v power adapter (like a computer one). The USB port does not supply enough voltage / power to run the camera. So you have to have a EH-5a power adapter. I have an after market one that was like $30. Don't use it often but does work. Needs to be 9v. Oh, Welcome to the site. ;) [/QUOTE]

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