IMac restarts when sleeping/display off

[firexed]

Hi, my IMac (Mojave 10.14.3) occasionally restarts when sleeping, or when I wake it, the mouse cursor freezes or disappears and it restarts. Only had this problem after upgrading to Mojave. Is it a hardware/compatibility issue with my wired mouse as the error log cuts off at "Thunderbolt Bus " ? Thanks

Error log :

Anonymous UUID: 1E7747B2-7983-1210-6BEF-98124EAC380D

Wed Mar 13 08:43:31 2019

*** MCA Error Report ***
CPU Machine Check Architecture Error Dump (CPU: Intel(R) Core(TM) i5-7500 CPU @ 3.40GHz, CPUID: 0x906E9)
CATERR detected! No MCA data found.


*** Device Tree ***
{
"pcie_cfg_base" : "0xe0000000",
"pci_devices" :
{
"0x0" : "MCHC@0",
"0x8000" : "PEG0@1",
"0x10000" : "IGPU@2",
"0xa0000" : "XHC1@14",
"0x100000" : "PEG0@1/IOPP/GFX0@0",
"0xb0000" : "IMEI@16",
"0xb8000" : "SATA@17",
"0x101000" : "PEG0@1/IOPP/HDAU@0,1",
"0xd8000" : "RP17@1B",
"0xe0000" : "RP01@1C",
"0xe1000" : "RP02@1C,1",
"0xe4000" : "RP05@1C,4",
"0xf8000" : "LPCB@1F",
"0xfa000" : "PMCR@1F,2",
"0xfb000" : "HDEF@1F,3",
"0xfc000" : "SBUS@1F,4",
"0x300000" : "RP01@1C/IOPP/ARPT@0",
"0x200000" : "RP17@1B/IOPP/SSD0@0",
"0x400000" : "RP02@1C,1/IOPP/GIGE@0",
"0x401000" : "RP02@1C,1/IOPP/SDXC@0,1",
"0x500000" : "RP05@1C,4/IOPP/UPSB@0",
"0x600000" : "RP05@1C,4/IOPP/UPSB@0/IOPP/DSB0@0",
"0x608000" : "RP05@1C,4/IOPP/UPSB@0/IOPP/DSB1@1",
"0x620000" : "RP05@1C,4/IOPP/UPSB@0/IOPP/DSB4@4",
"0x610000" : "RP05@1C,4/IOPP/UPSB@0/IOPP/DSB2@2",
"0x800000" : "RP05@1C,4/IOPP/UPSB@0/IOPP/DSB0@0/IOPP/NHI0@0",
"0x700000" : "RP05@1C,4/IOPP/UPSB@0/IOPP/DSB2@2/IOPP/XHC2@0"
},
"device_mmio" :
{
"PCI0@0" :
[
{ "a" : "0xcf8", "s" : "0x8" }
],
"PCI0@0/AppleACPIPCI/PEG0@1/IOPP/GFX0@0" :
[
{ "a" : "0x7f80000000", "s" : "0x10000000" },
{ "a" : "0x7f90000000", "s" : "0x200000" },
{ "a" : "0x92600000", "s" : "0x40000" },
{ "a" : "0x92640000", "s" : "0x20000" }
],
"PCI0@0/AppleACPIPCI/PEG0@1/IOPP/HDAU@0,1" :
[
{ "a" : "0x92660000", "s" : "0x4000" }
],
"PCI0@0/AppleACPIPCI/IGPU@2" :
[
{ "a" : "0x7f91000000", "s" : "0x1000000" },
{ "a" : "0x7fa0000000", "s" : "0x10000000" }
],
"PCI0@0/AppleACPIPCI/XHC1@14" :
[
{ "a" : "0x7f90310000", "s" : "0x10000" }
],
"PCI0@0/AppleACPIPCI/IMEI@16" :
[
{ "a" : "0x7f90324000", "s" : "0x1000" }
],
"PCI0@0/AppleACPIPCI/SATA@17" :
[
{ "a" : "0x92728000", "s" : "0x2000" },
{ "a" : "0x9272c000", "s" : "0x100" },
{ "a" : "0x9272b800", "s" : "0x800" }
],
"PCI0@0/AppleACPIPCI/RP17@1B/IOPP/SSD0@0" :
[
{ "a" : "0x92500000", "s" : "0x4000" }
],
"PCI0@0/AppleACPIPCI/RP01@1C/IOPP/ARPT@0" :
[
{ "a" : "0x92400000", "s" : "0x8000" },
{ "a" : "0x92000000", "s" : "0x400000" }
],
"PCI0@0/AppleACPIPCI/RP02@1C,1/IOPP/GIGE@0" :
[
{ "a" : "0x7f90200000", "s" : "0x10000" },
{ "a" : "0x7f90210000", "s" : "0x10000" }
],
"PCI0@0/AppleACPIPCI/RP02@1C,1/IOPP/SDXC@0,1" :
[
{ "a" : "0x7f90220000", "s" : "0x10000" }
],
"PCI0@0/AppleACPIPCI/RP05@1C,4/IOPP/UPSB@0/IOPP/DSB0@0/IOPP/NHI0@0" :
[
{ "a" : "0x92900000", "s" : "0x40000" },
{ "a" : "0x92940000", "s" : "0x1000" }
],
"PCI0@0/AppleACPIPCI/RP05@1C,4/IOPP/UPSB@0/IOPP/DSB2@2/IOPP/XHC2@0" :
[
{ "a" : "0x92800000", "s" : "0x10000" }
],
"PCI0@0/AppleACPIPCI/PMCR@1F,2" :
[
{ "a" : "0x92724000", "s" : "0x4000" }
],
"PCI0@0/AppleACPIPCI/HDEF@1F,3" :
[
{ "a" : "0x7f90320000", "s" : "0x4000" },
{ "a" : "0x7f90300000", "s" : "0x10000" }
],
"PCI0@0/AppleACPIPCI/SBUS@1F,4" :
[
{ "a" : "0x7f90325000", "s" : "0x100" }
],
"DMAC" :
[
{ "a" : "0x0", "s" : "0x20" },
{ "a" : "0x81", "s" : "0x11" },
{ "a" : "0x93", "s" : "0xd" },
{ "a" : "0xc0", "s" : "0x20" }
],
"FWHD" :
[
{ "a" : "0xff000000", "s" : "0x1000000" }
],
"IPIC" :
[
{ "a" : "0x20", "s" : "0x2" },
{ "a" : "0x24", "s" : "0x2" },
{ "a" : "0x28", "s" : "0x2" },
{ "a" : "0x2c", "s" : "0x2" },
{ "a" : "0x30", "s" : "0x2" },
{ "a" : "0x34", "s" : "0x2" },
{ "a" : "0x38", "s" : "0x2" },
{ "a" : "0x3c", "s" : "0x2" },
{ "a" : "0xa0", "s" : "0x2" },
{ "a" : "0xa4", "s" : "0x2" },
{ "a" : "0xa8", "s" : "0x2" },
{ "a" : "0xac", "s" : "0x2" },
{ "a" : "0xb0", "s" : "0x2" },
{ "a" : "0xb4", "s" : "0x2" },
{ "a" : "0xb8", "s" : "0x2" },
{ "a" : "0xbc", "s" : "0x2" },
{ "a" : "0x4d0", "s" : "0x2" }
],
"MATH" :
[
{ "a" : "0xf0", "s" : "0x1" }
],
"LDRC" :
[
{ "a" : "0x2e", "s" : "0x2" },
{ "a" : "0x4e", "s" : "0x2" },
{ "a" : "0x61", "s" : "0x1" },
{ "a" : "0x63", "s" : "0x1" },
{ "a" : "0x65", "s" : "0x1" },
{ "a" : "0x67", "s" : "0x1" },
{ "a" : "0x80", "s" : "0x1" },
{ "a" : "0x92", "s" : "0x1" },
{ "a" : "0xb2", "s" : "0x2" },
{ "a" : "0xffff", "s" : "0x1" },
{ "a" : "0x1800", "s" : "0xff" },
{ "a" : "0x800", "s" : "0x80" }
],
"RTC" :
[
{ "a" : "0x70", "s" : "0x8" }
],
"TIMR" :
[
{ "a" : "0x40", "s" : "0x4" },
{ "a" : "0x50", "s" : "0x4" }
],
"SMC" :
[
{ "a" : "0x300", "s" : "0x20" },
{ "a" : "0xfef00000", "s" : "0x10000" }
],
"EC" :
[
{ "a" : "0x62", "s" : "0x1" },
{ "a" : "0x66", "s" : "0x1" }
],
"PDRC" :
[
{ "a" : "0xfed10000", "s" : "0x8000" },
{ "a" : "0xfed18000", "s" : "0x1000" },
{ "a" : "0xfed19000", "s" : "0x1000" },
{ "a" : "0xe0000000", "s" : "0x10000000" },
{ "a" : "0xfd000000", "s" : "0x1800000" },
{ "a" : "0xfed20000", "s" : "0x20000" },
{ "a" : "0xfed90000", "s" : "0x4000" },
{ "a" : "0xfed45000", "s" : "0x4b000" },
{ "a" : "0xff000000", "s" : "0x1000000" },
{ "a" : "0xfee00000", "s" : "0x100000" }
]
}
}



EOF
Model: iMac18,3, BootROM 166.0.0.0.0, 4 processors, Intel Core i5, 3.4 GHz, 8 GB, SMC 2.41f1
Graphics: Radeon Pro 570, Radeon Pro 570, PCIe
Memory Module: BANK 0/DIMM0, 4 GB, DDR4, 2400 MHz, 0x802C, 0x344154463531323634485A2D3247334532202020
Memory Module: BANK 1/DIMM0, 4 GB, DDR4, 2400 MHz, 0x802C, 0x344154463531323634485A2D3247334532202020
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x16F), Broadcom BCM43xx 1.0 (7.77.61.1 AirPortDriverBrcmNIC-1305.2)
Bluetooth: Version 6.0.10f1, 3 services, 27 devices, 1 incoming serial ports
Network Service: Wi-Fi, AirPort, en1
Serial ATA Device: APPLE HDD ST1000DM003, 1 TB
USB Device: USB 3.0 Bus
USB Device: USB Optical Mouse
USB Device: Bluetooth USB Host Controller
USB Device: FaceTime HD Camera (Built-in)
Thunderbolt Bus:

 

[Fishrrman]

Is the RAM inside original?
Or... has it been changed?

 

[firexed]

Original.

 

[firexed]

Still happens often, multiple times a day. Could it be my wired mouse ? No external HDDs connected. Downloaded & ran Etrecheck, no major problems found.