MDM Trouble Report for 2006 May 27 Telescope: 2.4m Observer(s): Morgan (OSU) Instrument: 8k mosaic Problem(s) Encountered: Toward morning twilight, I received the following errors in the detcom window during an exposure readout: read failed: Resource temporarily unavailable 1st timing board TDL failed 1st utility board TDL failed 2nd timing board TDL failed 2nd utility board TDL failed Subsequent exposures all failed to initiate. Trying a test exposure gave: Can't communicate with 1st timing board; not downloading DSP code. Can't communicate with 1st utility board; not downloading DSP code. Can't communicate with 2nd timing board; not downloading DSP code. Can't communicate with 2nd utility board; not downloading DSP code. Trying to power off the mosaic gave: no response from 1st utility board (lub0 POF) `cmd lub0 POF' failed voltage rdmem failed for 1st Failed to disable high voltages for 1st. no response from 2nd utility board (lub1 POF) `cmd lub1 POF' failed voltage rdmem failed for 2nd Failed to disable high voltages for 2nd. and just pressing enter in the detcom window to test communication gave: TDL failed to get any responses. I am following procedures listed in document 'rescue procedures in case of failing exposures' but have yet to fix it. ------------------------------ Submitted on 2006 May 27 [5:58:24]