# A wrong power adapter connected to USRP and now it doesn't work (LED doesn't blink) **URL:** \ **Category:** GNU Radio\ **Created:** [November 3, 2011, 5:16pm UTC](https://www.ruby-forum.com/t/a-wrong-power-adapter-connected-to-usrp-and-now-it-doesnt-work-led-doesnt-blink/213494 "2011-11-03T17:16:54Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![luislavena](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/0ea827/32.png) [@luislavena](https://www.ruby-forum.com/u/luislavena)\ **Post date:** [November 3, 2011, 5:16pm UTC](https://www.ruby-forum.com/t/a-wrong-power-adapter-connected-to-usrp-and-now-it-doesnt-work-led-doesnt-blink/213494/1 "2011-11-03T17:16:54Z")
My adviser accidentally plugged in a laptop’s power adapter into a USRP for a few seconds and now it doesn’t respond and GNU Radio doesn’t detect it either after connecting to the laptop and testing it. What do I do? I hope that there must be a fuse that is replaceable or some sort of mechanism to prevent the USRP from being fried. Any help will be greatly appreciated. Thanks, John ---
**Author:** ![Marcus\_M](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/cdc98d/32.png) [@Marcus\_M](https://www.ruby-forum.com/u/Marcus_M)\ **Post date:** [November 3, 2011, 5:26pm UTC](https://www.ruby-forum.com/t/a-wrong-power-adapter-connected-to-usrp-and-now-it-doesnt-work-led-doesnt-blink/213494/2 "2011-11-03T17:26:49Z")
On Thu, Nov 3, 2011 at 12:15 PM, Marcus M [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > My adviser accidentally plugged in a laptop’s power adapter into a USRP for > a few seconds and now it doesn’t respond and GNU Radio doesn’t detect it > either after connecting to the laptop and testing it. What do I do? I hope > that there must be a fuse that is replaceable or some sort of mechanism to > prevent the USRP from being fried. Any help will be greatly appreciated. Do the LED’s work? If not, check the fuse on F501. Thomas ---
**Author:** ![Marcus\_M](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/cdc98d/32.png) [@Marcus\_M](https://www.ruby-forum.com/u/Marcus_M)\ **Post date:** [November 3, 2011, 5:56pm UTC](https://www.ruby-forum.com/t/a-wrong-power-adapter-connected-to-usrp-and-now-it-doesnt-work-led-doesnt-blink/213494/3 "2011-11-03T17:56:29Z")
On 03/11/2011 12:15 PM, Marcus M wrote: > My adviser accidentally plugged in a laptop’s power adapter into a > USRP for a few seconds and now it doesn’t respond and GNU Radio > doesn’t detect it either after connecting to the laptop and testing > it. What do I do? I hope that there must be a fuse that is replaceable > or some sort of mechanism to prevent the USRP from being fried. Any > help will be greatly appreciated. > > Thanks, > John > For a USRP1, F501 will provide some protection. Not guaranteed or > anything, but some. Check F501 for continuity. For a USRP2, F101 For an N2XX, F101 ---
**Author:** ![Marcus\_M](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/cdc98d/32.png) [@Marcus\_M](https://www.ruby-forum.com/u/Marcus_M)\ **Post date:** [November 3, 2011, 6:15pm UTC](https://www.ruby-forum.com/t/a-wrong-power-adapter-connected-to-usrp-and-now-it-doesnt-work-led-doesnt-blink/213494/4 "2011-11-03T18:15:38Z")
On 11/03/2011 12:15 PM, Marcus M wrote: > My adviser accidentally plugged in a laptop’s power adapter into a USRP for > a few seconds and now it doesn’t respond and GNU Radio doesn’t detect it > either after connecting to the laptop and testing it. What do I do? I hope > that there must be a fuse that is replaceable or some sort of mechanism to > prevent the USRP from being fried. Any help will be greatly appreciated. In the future, be aware of your Advisor’s Negation Field: > **[PHD Comics: Negation Field](https://phdcomics.com/comics.php?f=821)** > > Link to phdcomics.com Philip