Its been here for days like that, so holding it on for more time won’t change it 
Hoping this can be of ‘some’ use, posting the verbose log of the DFU-Util flash… Getting more and more the idea my Core is broken… 
-=- Full Log of DFU-Util Flash -=-
dfu-util -d 1d50:607f -a 1 -s 0x00020000 -D …\core_tinker.bin -v
dfu-util 0.8
Copyright 2005-2009 Weston Schmidt, Harald Welte and OpenMoko Inc.
Copyright 2010-2014 Tormod Volden and Stefan Schmidt
This program is Free Software and has ABSOLUTELY NO WARRANTY
Please report bugs to dfu-util@lists.gnumonks.org
Invalid DFU suffix signature
A valid DFU suffix will be required in a future dfu-util release!!!
Deducing device DFU version from functional descriptor length
Opening DFU capable USB device…
ID 1d50:607f
Run-time device DFU version 011a
Claiming USB DFU Interface…
Setting Alternate Setting #1 …
Determining device status: state = dfuERROR, status = 10
dfuERROR, clearing status
Determining device status: state = dfuIDLE, status = 0
dfuIDLE, continuing
DFU mode device DFU version 011a
Device returned transfer size 1024
DfuSe interface name: "SPI Flash : SST25x"
Memory segment at 0x00000000 512 x 4096 = 2097152 (rew)
Downloading to address = 0x00020000, size = 79996
Download [ ] 0% 0 bytes Poll timeout 50 ms
Poll timeout 0 ms
Download from image offset 00000000 to memory 00020000-000203ff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 00000400 to memory 00020400-000207ff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 00000800 to memory 00020800-00020bff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 00000c00 to memory 00020c00-00020fff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Poll timeout 20 ms
Poll timeout 0 ms
Download from image offset 00001000 to memory 00021000-000213ff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 00001400 to memory 00021400-000217ff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 00001800 to memory 00021800-00021bff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 00001c00 to memory 00021c00-00021fff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Poll timeout 20 ms
Poll timeout 0 ms
Download from image offset 00002000 to memory 00022000-000223ff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 00002400 to memory 00022400-000227ff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 00002800 to memory 00022800-00022bff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 00002c00 to memory 00022c00-00022fff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Poll timeout 20 ms
Poll timeout 0 ms
Download from image offset 00003000 to memory 00023000-000233ff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 00003400 to memory 00023400-000237ff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 00003800 to memory 00023800-00023bff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 00003c00 to memory 00023c00-00023fff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Poll timeout 20 ms
Poll timeout 0 ms
Download from image offset 00004000 to memory 00024000-000243ff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 00004400 to memory 00024400-000247ff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 00004800 to memory 00024800-00024bff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 00004c00 to memory 00024c00-00024fff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Poll timeout 20 ms
Poll timeout 0 ms
Download from image offset 00005000 to memory 00025000-000253ff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 00005400 to memory 00025400-000257ff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 00005800 to memory 00025800-00025bff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 00005c00 to memory 00025c00-00025fff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Poll timeout 20 ms
Poll timeout 0 ms
Download from image offset 00006000 to memory 00026000-000263ff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 00006400 to memory 00026400-000267ff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 00006800 to memory 00026800-00026bff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 00006c00 to memory 00026c00-00026fff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Poll timeout 20 ms
Poll timeout 0 ms
Download from image offset 00007000 to memory 00027000-000273ff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 00007400 to memory 00027400-000277ff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 00007800 to memory 00027800-00027bff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 00007c00 to memory 00027c00-00027fff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Poll timeout 20 ms
Poll timeout 0 ms
Download from image offset 00008000 to memory 00028000-000283ff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 00008400 to memory 00028400-000287ff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 00008800 to memory 00028800-00028bff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 00008c00 to memory 00028c00-00028fff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Poll timeout 20 ms
Poll timeout 0 ms
Download from image offset 00009000 to memory 00029000-000293ff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 00009400 to memory 00029400-000297ff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 00009800 to memory 00029800-00029bff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 00009c00 to memory 00029c00-00029fff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Poll timeout 20 ms
Poll timeout 0 ms
Download from image offset 0000a000 to memory 0002a000-0002a3ff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 0000a400 to memory 0002a400-0002a7ff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 0000a800 to memory 0002a800-0002abff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 0000ac00 to memory 0002ac00-0002afff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Poll timeout 20 ms
Poll timeout 0 ms
Download from image offset 0000b000 to memory 0002b000-0002b3ff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 0000b400 to memory 0002b400-0002b7ff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 0000b800 to memory 0002b800-0002bbff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 0000bc00 to memory 0002bc00-0002bfff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Poll timeout 20 ms
Poll timeout 0 ms
Download from image offset 0000c000 to memory 0002c000-0002c3ff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 0000c400 to memory 0002c400-0002c7ff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 0000c800 to memory 0002c800-0002cbff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 0000cc00 to memory 0002cc00-0002cfff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Poll timeout 20 ms
Poll timeout 0 ms
Download from image offset 0000d000 to memory 0002d000-0002d3ff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 0000d400 to memory 0002d400-0002d7ff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 0000d800 to memory 0002d800-0002dbff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 0000dc00 to memory 0002dc00-0002dfff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Poll timeout 20 ms
Poll timeout 0 ms
Download from image offset 0000e000 to memory 0002e000-0002e3ff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 0000e400 to memory 0002e400-0002e7ff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 0000e800 to memory 0002e800-0002ebff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 0000ec00 to memory 0002ec00-0002efff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Poll timeout 20 ms
Poll timeout 0 ms
Download from image offset 0000f000 to memory 0002f000-0002f3ff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 0000f400 to memory 0002f400-0002f7ff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 0000f800 to memory 0002f800-0002fbff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 0000fc00 to memory 0002fc00-0002ffff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Poll timeout 20 ms
Poll timeout 0 ms
Download from image offset 00010000 to memory 00030000-000303ff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 00010400 to memory 00030400-000307ff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 00010800 to memory 00030800-00030bff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 00010c00 to memory 00030c00-00030fff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Poll timeout 20 ms
Poll timeout 0 ms
Download from image offset 00011000 to memory 00031000-000313ff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 00011400 to memory 00031400-000317ff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 00011800 to memory 00031800-00031bff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 00011c00 to memory 00031c00-00031fff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Poll timeout 20 ms
Poll timeout 0 ms
Download from image offset 00012000 to memory 00032000-000323ff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 00012400 to memory 00032400-000327ff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 00012800 to memory 00032800-00032bff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 00012c00 to memory 00032c00-00032fff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Poll timeout 20 ms
Poll timeout 0 ms
Download from image offset 00013000 to memory 00033000-000333ff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 00013400 to memory 00033400-000337ff, size 1024
Poll timeout 30 ms
Poll timeout 0 ms
Download from image offset 00013800 to memory 00033800-0003387b, size 124
Poll timeout 30 ms
Poll timeout 0 ms
File downloaded successfully
-=- End Log -=-
Hi all, so guess the Core is moved on to its next life…
Any idea if there is a hardware replacement/warranty option here? No clue how to get in contact with the actual Particle team…
Cheers,
J.
Drop them a message at hello@particle.io or https://docs.particle.io/support/support-and-fulfillment/menu-base/photon/