CROSS-POSTED to QRZ.COM (answered there, July 31, 2022)
e-Ham.net Reviews
Amateur Radio Equipment Repair
https://www.eham.net/reviews/view-category?id=26The Kenwood TS-140 HF Transceiver is now 30+ years old.
So, basic service (lamps, lithium battery, non-corrosion) to be expected.
OEM parts not guaranteed to be available, requiring “experienced” bench tech for repairs.
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Jahnke Electronics : Green Bay, WI
Specializes in repair and alignment of Kenwood brand ham radio gear,
https://jahnkeelectronics.com/contact/Jahnke Electronics acquired ALL Kenwood Service Manuals & Documentation
from AAVID, when Clif Holland retired.
https://www.eham.net/reviews/view-product?id=11837Midwest Technical Services : Watertown, South Dakota
Tim Moes, WD0FKC
Former Service Manager and Radio Technician at Burghardt Amateur Center (SD)
http://www.midwest-technical.com/