Namaste Nagaraj, In my opinion, the condition for the test is that it should be continuous and any significant break in the test which allows for the parts under test to 'normalize' will invalidate the test result. As its a customer qualification if I was themI would have reservations about how reliable the product performed given such a break. Personally I would scrap the samples and repeat the test with fresh product. RegardsColin Sent from Yahoo Mail for iPhone On Sunday, December 13, 2015, 4:59 pm, Nagaraj U <[log in to unmask]> wrote: Hi All, We are manufacturers of bare PCBs. We were conducting temperature cycling test as per Condition B of JESD22-A104D (-55°C to +125°C). The test requirement was for 500 cycles. This testing was a part of qualification of PCBs for one of our customer. We have loaded a set of 4 bare PCBs and 4 assembled PCBs (not powered on - loaded in passive mode after assembly) in the thermal cycling chamber. Now, 350 cycles are completed, but the thermal cycling chamber has stopped due to some issue with the thermal cycling equipment. Now my question......... can the testing be continued for another 150 cycles to complete 500 cycles OR should the whole exercise be started from fabrication of fresh PCBs, Assembly and do the temperature cycling all over again. OR, is there any standards which I could refer to handle this situation. Thanks in advance for your valuable inputs. Best Regards, U.Nagaraj MICROPACK LIMITED, Bangalore, INDIA. Kindly note: Our domain name has changed to micropack.in from micro-pack.com, please update my email-id in your address book with the new domain name - micropack.in [Logo]<http://www.micropack.in> ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________