The autopulse platform (s/n (b)(4)) was returned to the manufacturer for evaluation.Visual inspection was performed and no external damages were observed.The reported complaint however was confirmed; the display backlight was not functioning properly which resulted in the display being difficult to read.Further inspection identified the cause to be a defective processor pca assembly.Compression testing was performed with a test mannequin for 10 minutes and no user advisories or warnings were displayed.With the exception of the previously observed dark display, the platform performed as intended during functional evaluation.The platform archive was reviewed and no user advisories or warnings were observed on the reported event date.Based on the investigation, the part identified for replacement was the processor pca assembly.In summary, the reported complaint of the lcd display not functioning properly was confirmed during visual inspection and is attributed to the defective processor pca assembly.Following service, including replacement of the pca assembly, the device passed all testing criteria.
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