Issue connecting to RAMBo board

Hello,

I’ve been having some sort of issue connecting to my RAMBo v1.4 board. When I try using it with Repetier-Host I get the following message:
17:22:32.778 : No start signal detected - forcing start
17:23:15.879 : Communication timeout - reset send buffer block

After doing some research and trying to change the settings to fix it I see some information that this might be a firmware issue, so I try flashing the most recent version of the MPCNC dual endstop firmware just in case there was some issue with it. When I try doing this using the Arduino IDE I get an the following message:
An error occurred while uploading the sketch
avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_getsync(): timeout communicating with programmer

It seems like there is some connection issue, but the RAMBo still appears in my Device Manager under my COM ports, so I’m not sure whats causing the issue.

Here’s a picture of the board, if that helps:

My computer is running Windows 10.

We can’t use arduino anymore, give platform io a shot.

I tried using Platform io but it gives me the same problem as the Arduino IDE:
avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_getsync(): timeout communicating with programmer

You have the USB in and the board powered?

Unplug your endstops and check your fuses. It looks like you might have shorted them. They are facing opposite ways. Hard to tell from the pictures, but your Ymax plug looks to be wrong.

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Unplugging the endstops seems to have fixed the issue! Thanks for the help

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