I have trouble after 3 hours the mouse and bluetooth stop

iMac 21.5" Mid 2011 2.5 GHz Intel Core i5

Hello,

I'm having trouble with my 21.5" iMac. After working for 2 - 3 hours the mouse with Bluetooth and USB port connected keyboard stop working.

Sometimes I can work a whole day without any problems, other times it stops and I have to restart my system to get it working again.

How can fix this? Thanks

I have this error: 4SNS/1/40000000: TH00-9.000

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Have you tried running any diagnostics? How about rebooting your system and holding the 'Option' & 'D' keys to let the builtin diagnostics run

crwdns2934271:0Yan 23, 2017crwdnd2934271:0 Dan crwdne2934271:0

thanks friend

i will do and see what see

thanks

crwdns2934271:0Yan 23, 2017crwdnd2934271:0 abdulkafi crwdne2934271:0

thanks so match

crwdns2934271:0Yan 27, 2017crwdnd2934271:0 abdulkafi crwdne2934271:0

Can you please help, I have this model and my Bluetooth and key board is not responding.

crwdns2934271:0Huk 13, 2019crwdnd2934271:0 Jojo biag crwdne2934271:0

have truble in ice

crwdns2934271:0Huk 13, 2019crwdnd2934271:0 abdulkafi crwdne2934271:0

crwdns2933897:0crwdne2933897:0

Someone put in a replacement HD and forgot to add in the needed hardware sensor if they put in a non-Apple drive the system came with. Here is the needed sensor: OWC In-line Digital Thermal Sensor for iMac 2011 Hard Drive Upgrade and here is the needed steps to get to it: iMac Intel 21.5" EMC 2428 Hard Drive Replacement. You can stop as Step12 to slide on the sensor for the drive you have now.

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iMac Intel 21.5" EMC 2428