Description:

This is a rare opportunity to acquire an original, factory sealed copy of Professional PC Diagnostics by Landmark — one of the most respected PC service diagnostic tools from the late 1980s/early 1990s. Still in its original shrink wrap, this package is exceptionally hard to find sealed and is highly desirable for collectors and retro computing enthusiasts.

Item Details:

• Brand: Landmark

• Product: Professional PC Diagnostics

• Edition: XT/AT ROM Combo (see spine label & serial)

• Serial Number: 0136423A1

• Format: Boxed software with diagnostic utilities

• Features include:

• CPU & Motherboard Tests

• Award-winning Memory Tests

• Video Adapter & Monitor Tests

• Hard Drive Tests & Utilities

• Serial, Parallel & Printer Tests

• Keyboard Tests

• Jumpstart™ ROM POST modules

• Loopback Plugs (listed on box contents)

• PC Magazine Editor’s Choice Award, 1990

• Condition: Brand New / Factory Sealed (plastic wrap intact with light shelf wear at corners)

Why It’s Special:

• Rare sealed package, seldom seen on the market

• Professional-grade diagnostics for IBM PC, XT, AT era systems

• Collectible retro software with historical significance

Shipping:

• Ships fast, well protected in a sturdy box

• International buyers welcome ( International Shipping available)

• Note: Due to sealed status, returns not accepted if opened

Item Specifics

• Brand: Landmark

• Type: Diagnostic Software / Utilities

• Platform: IBM PC, XT, AT

• Format: Floppy Disk (boxed software package with ROMs & utilities — unopened/sealed)

• Model: Professional PC Diagnostics XT/AT ROM Combo

• Release Year: 1990

• Country/Region of Manufacture: United States (box printed in USA; ROM label states Hong Kong assembly if noted)

• Condition: Brand New (Factory Sealed)

• Language: English

• Features: Diagnostic Utilities, Hardware Testing, ROM POST, Loopback Plugs

• License Category: Standard (perpetual, original boxed product)

• Custom Bundle: No

• Modified Item: No