We offer a complete inventory of Atari ST Computer repair / replacement parts (down to component level, Switches, I.C. Chips, ST Mouse parts, plastics....) as well as complete computers and replacement Motherboards.   Not all of the hundreds of different Atari ST computer replacement parts we carry are listed here.  If you do not see the Atari ST part or items you are looking for see the Best Rev. 10 Catalog or E-Mail us at:  Sales  

Atari 520ST, 520STFM and 1040ST Computer. 68000 Microprocessor with built in 720K disk drive, MIDI serial/parallel ports

CB102867   New  Atari NTSC / US 1040ST Computer with English Owners Manual,110V Power Cord and STM1 Mouse $299.00
CB102867-RE  Reconditioned 1040ST NTSC $199.00
CB102986 New  Atari NTSC / US 520STFM Computer with Built in RF Modulator (US TV output), English Owners Manual,110V Power Cord and STM1 Mouse $235.00
CB102871  Atari NTSC 1040STE Computer Reconditioned1 Meg Ram (User Upgrade able to 4 Meg), with English Owners Manual, 110V Power Cord and STM1 Mouse.   $350.00
CB101630 Atari 520STE / 1040STE / MegaSTE 1 Meg 30 pin upgrade SIMM Memory          $10.00ea

ST / 520STFM / 1040STF English version Owners Manual 97 Pages   

CB101485   

$10.00

ST / 520STFM / 1040STF French version Owners Manual 118 Pages   

CO26406     

$10.00

New World II 4 Meg Memory, SIMM type Upgrade, for ST/520STFM/1040STF computers

CB101935  

$99.00

Marpet 4 Meg Memory, SIMM type Upgrade, for ST/520STFM/1040STF computers

CB101935-UK  

$89.00

"TT" Touch "The Best" upgrade for the 520STFM / 1040STF / 1040STE Keyboards By Best Electronics. Improved High Grade Replacement Internal Silicone contacts firms up and gives you a Tactile bounce back on each 520STFM / 1040STF / 1040STE Keycap. Upgrades your Mushy 520STFM / 1040STF / 1040STE keyboard to the Atari TT / High grade P.C. type key board standards, an amazing difference compared to the stock ST / STE Keyboards. A must for ever Touch Typist! Set of 95 contacts for all world wide 520STFM / 1040STF / 1040STE version Keyboards, only a #0 Phillips screw driver required for installation! CB101980     $44.95  Special Buy!!  $21.95

Mega Touch Now one of those Must Have Upgrades for all 520STFM / 1040STF / 1040STE Owners! 520STFM/1040STF/1040STE/ 4160STE "Mega Touch" keyboards springs Firms up mushy ST keyboard key caps. One full ST keyboard set of springs. CB101634 $9.95

520STFM / 1040STF Dust Cover
This Custom made 520STFM / 1040STF Dust Cover is made of a Clear Translucent light weight textured vinyl with reinforced edging. 18 3/4 inches x 11 3/4 inches x 2 3/4 - 1 5/8 inches approximately.  CB101102  $10.95

520STFM / 1040STF Clear Keyboard Protector / Overlay For your ST keyboard. This clear, flexible skin covers the keys of your keyboard but lets you See and Type through it. Used to protect your ST keyboard from dust, liquids, metals and other small items that could fall into your keyboard and damage it. CB101951  $19.95

Atari 520ST/1040ST English Owners Manual CB101485 $12.00

1040STE / 4160STE English version Owners Manual with Addendum.  Includes ST Owners Manual. (CB101485) and STE Addendum. CB101873  $12.00

520STFM / 1040ST / 520STE / 1040STE / 4160STE Dust Cover.
This Custom made Dust Cover with side cut outs for the STE Analog Joystick ports, is made of a Clear Translucent light weight textured vinyl with reinforced edging. 18 3/4 inch X 12 inch X 2 3/4 - 1 5/8 inch approximately. CB101102  $10.95

520STFM / 1040ST / 520STE / 1040STE / 4160STE    Clear Keyboard Protector / Overlay  For your STE keyboard. This clear, flexible skin covers the keys of your keyboard but lets you See and Type through it. Used to protect your STE keyboard from dust, liquids, metals and other small items that could fall into your keyboard and damage it. CB102419  E-Mail

Megamater Cable for the 520STFM, 1040ST, 1040STE / 4160STE This short inexpensive cable assembly (8 pin connector to 6 pin Phone jack) allows you to interface a complete Mega free standing Keyboard assembly (Best part # CB101513 keyboard + CB101539 keyboard cable) to your STFM / STE computer. All you have to do is unplug your STFM / STE internal keyboard connector, plug in Megamater cable and snake the 6 pin receptacle end of the cable out through the joystick port. For Best results, the right side top or bottom half of the STFM / STE / Falcon case should be notched for the 6 pin connector housing for best strain relief! Now you will have an Atari lap keyboard with full Keyboard / Mouse / Joystick functions! CB101909  $15.95


Atari ST Diagnostics

Atari 520ST Service MANUAL

All world wide versions 60 Pages. Sections covered: Theory of Operation/ Case Design/ Architecture/ Main System/ Graphics Subsystem / Music System / Device Subsystems/System Timing Diagram System Block Diagram, Schematics and Silk-screen,Testing/Overview-Test Equipment-Power Up Test ST Diagnostic Cartridge-Error Code List, Disassembly/ Assembly/Top Cover/ Keyboard Removal-Bottom Cover Removal-Shield Removal/ Reassemble, Symptom Checklist-Display Problems -Drive Interface Problems-MIDI Problems-Printer Port Problems-Keyboard/Mouse Problems/ Error Code Quick Reference, Diagnostic Flowcharts/Swap out Procedures/ Handling of Integrated Circuits-Power up Test-Black screen-White Screen-Scrambled Screen, Parts List and Updates.   CO26118  $32.00

Atari Service Manual 520ST / 520STFM / 1040STF Computers For all world wide 32 Ram Chip versions. 80 Pages. Sections covered: Introduction Case Design-Power Supply, Theory of Operation-Main System-Audio/Video subsystem Input/Output subsystems-System Startup System Errors-Functional Block Diagram-System clock diagram, Testing Overview/Test equipment Test Configuration -Troubleshooting a dead unit Diagnostic-Cartridge -Error Codes-Test Harness Hook-up Diagram, Disassembly / Assembly-1040 Disassembly 1040 Assembly 520 Disassembly 520 Assembly, Symptom Checklist, Diagnostic Flowcharts, Parts list and Assembly Drawings, Schematics and Silk-screen and Glossary.  CB101474  $40.00

Sams Computer facts  Service Manual for 520STNTSC/U.S. version computer, 520ST external U.S. 110 Volt power supply (only one version), Goldstar SM124 U.S. version Monochrome monitor and Epson SF354 disk drive. Sections covered: Block Diagram, Disassembly Instructions, General Operating Instructions, Grid Trace Location Guide Main Board-Power Supply, I.C. Pinouts and Terminal Guides, Line Definitions, Logic, Parts List, Photos Keyboard-Main Board-Power Supply Board, Safety Precautions, Schematics- Keyboard-Main Board-Power Supply, Schematic Notes, Test Equipment and Troubleshooting. 89 pages. CB101098  $49.00

1040STE / 4160STE Atari Field Service Manual  For all world wide versions. Sections covered, Introduction: Overview-Main Components-Case Design-Power Supply-Negative Supplies, Theory of Operation: Overview-Main System-Audio/Video Subsystem-Input/Output Subsystems-Microprocessing Unit-GSTMCU-Main Memory-Direct Memory Access-Multi-function Peripheral Control-Audio/Visual Subsystem-Digitized Sound-Genlock and the STe-Input/Output Systems-System Startup-System Errors, Testing: Overview-Test Configuration-Troubleshooting a dead Unit-520STE / 1040STE Diagnostic Cartridge-Power Up Sequence-Test Menu-RAM Test-ROM Test-Color Test-Keyboard Test-Midi Tests-RS232 Tests-Audio Test-Timing Test-DMA Tests-Floppy Disk Tests-Printer and Joystick Port Tests-Monochrome Monitor-Hard Disk Write/Read-Graphics Chip Blit-Error Codes Quick Reference, Disassembly /Assembly:520STE/1040STE Disassembly-520STE/1040STE Assembly, Symptom Checklist: Display Problems-Disk Drive Problems-Keyboard Problems-Midi Problems-RS232 Problems-Printer Port Problems-Hard Disk Port Problems and DMA Sound, Diagnostic Flowcharts: Replacement Procedures-Handing of Integrated Circuits, Parts List, Glossary and Schematics and PCB Silk-screen.. 94 pages with 8 pages of Atari Schematics. CB101626  $50.00

ST / Mega 4.3 Rev. Diagnostic Cartridge18+ Diagnostic Tests. Ram, ROM, Color, Keyboard, Midi (requires loop back cable), Serial Port (requires shorting connector), Audio, Timing, DMA Port (requires Loop back board and cable), Printer / Joy Ports (requires joy loop back + Printer cables with Loop back board) High Resolution (requires SM124 / SM125 /SM147), Short Blitter, Long Blitter, Real Time Clock, Hard Disk Read /Write Test with Park feature, Expansion Connector (Mega), Examine / Modify Memory, Set RS232 Rate, 50 / 60 Hz Video output Toggle, Internal tests burn in tests, All Tests Burn in cycle, Floppy Disk Tests including Test Disk Speed, Quick Test, Install Disk drives, Check 80 - 82 Copy Protect Tracks, Read Alignment Disk, Disk Interchange Test, Disk Exerciser Tests, this ST Diagnostic Cartridge also checks for current Keyboard I.C. Rev., TOS O.S. Version and Total ST Memory present during boot up. Cartridge and small manual.  CB101615 $39.95

ST / Mega 3.61 Rev. Diagnostic Cartridge This ST Diagnostic Cartridge is an earlier version of the above ST Diagnostic cartridge. 12+ Diagnostic Tests. Ram, ROM / O.S., Color, Keyboard, Midi (requires loopback cable), Serial Port (requires shorting connector), Audio, Timing, DMA Port (requires Loop back board and cable), Printer / Joy Ports (requires joy loop back + Printer cables with Loopback board) High Resolution (requires SM124 / SM125 / SM147), Examine / Modify Memory, Set RS232 Rate, 50 / 60 Hz Video output Toggle, Internal tests burn in tests, All Tests Burn in cycle, Floppy Disk Tests including Test Disk Speed, Quick Test, Install Disk drives, Check 80 - 82 Copy Protect Tracks, Read Alignment Disk, Disk Interchange Test, Disk Exerciser Tests, this ST Diagnostic Cartridge also checks for current Keyboard I.C. Rev., TOS O.S. Version, 50 or 60 Hz operation and Total ST Memory present during boot up. Cartridge and small manual.  CB102811 $24.95

520STE / 1040STE / 4160STE Rev.1.9 Diagnostic Cartridge  17+ Diagnostic Tests. Ram, ROM, Color, Keyboard, Midi (requires loop back cable), Serial Port (requires shorting connector), Audio, Timing, DMA Ports (requires Loop back board and cable), Printer / Joy Ports (requires joy loop back + Printer cables with Loop back board) (Analog Joystick port test, requires an Available Atari external STe test board and cables) High Resolution (requires SM124 / SM125 / SM147), Short Blitter, Long Blitter, Hard Disk Read / Write Test with Park feature, Expansion Connector (Mega), Examine / Modify Memory, Set RS232 Rate, 50 / 60 Hz Video output Toggle, Internal tests burn in tests, All Tests Burn in cycle, Floppy Disk Tests including Test Disk Speed, Quick Test, Install Disk drives, Check 80 - 82 Copy Protect Tracks, Read Alignment Disk, Disk Interchange Test, Disk Exerciser Tests also checks for current Keyboard I.C. Rev., TOS O.S. Version, 50 or 60 Hz operation and Total ST Memory present.  CB102032  $50.00

520STE / 1040STE / 4160STE    Rev. 1.4 Diagnostic Cartridge
This is an earlier Atari Factory / Manufacturing version of the above Atari Service Center STe Diagnostic Cartridge. This cartridge was used by the Atari factory to in-house test STE Computers during the Assembly Process! This 1.4 version STE Diagnostic Cartridge tests the following, Video, Audio, Midi (requires loop back cable), Serial Port (requires shorting connector), DMA Port (requires Loop back board and cable), Blitter, Floppy, ROM, Ram, Printer and Joystick Ports (requires joy loop back + Printer cables with Loop back board), Monochrome, Keyboard, Timing, Examine / Modify Memory, Set RS232 Rate, 50 / 60 Hz Video output Toggle also checks for current Keyboard I.C. Rev., TOS O.S. Version, 50 or 60 Hz operation and Total ST Memory present. CB102709  $39.95 

520STE / 1040STE / 4160STE Special version External Loop back board With Analog HD-15 Joystick Test ports. Loop back board, less all connecting cables CB102678 $100.00
Atari Service Center ST Diagnostic Assembly complete, Diagnostic Cartridge, Loop back board, cables and Atari Field Service Manuals (U.S. 520ST / 1040STF, Epson 1/2 Height SF354 / SF314, 3-SC1224s U.S. versions, SM124 U.S. version, SMM804 U.S. version) CB101477 CALL
Atari ST / Mega / STE / MegaSTe / TT Loop back Test P.C. board for Joystick / Mouse ports, Parallel, DMA, Midi and Serial ports to run all of the External ST port test s using the above ST Diagnostic Cartridge. Includes Atari Loop Back Board, one each Parallel-DMA-Midi-Joystick / Mouse (2) connecting cables and DB25 Serial port shorting plug. Only Available in the past with the above Complete ST Diagnostic Service Kits. Requires an Atari ST / Mega, STE, MegaSTe or TT Atari Diagnostic Cartridge to run the External port Diagnostic tests. Special One Time Buy, Once sold out, they will never be available again! CB102271 $69.00
Replacement ST Diagnostic Loop Back P.C. Test board only    CB102604   $49.00
Replacement 9 pin female to 9 pin female Joystick/Mouse Port Jumper 30 inch cable for above ST Diagnostic Test Board.   CB101870   $5.00 ea.
Replacement Midi 12 to 13 1/2 inch loop back cable for above ST Diagnostic kit.   CB102600 $4.00
Replacement DB-25 Female Serial Shorting plug for above ST Diagnostic kit.   CB102601   $3.50
Replacement Hard drive 24 inch cable DB-19M to DB-19M for above ST Diagnostic Test board.   CB102602   $14.00
Replacement DB25 Male to DB25 Male 13 inch cable for above ST Diagnostic Test board.   CB102603   $12.00

Atari Power Supplies

520STFM/1040STF/1040STE/ 4160STE Atari Internal U.S. Power Supply CB101500 $75.00
520STFM/1040STF/1040STE/ 4160STE Atari Internal 220 Volt Power Supply    CB102621 $59.00
"The Best" Top Rated Heavy Duty Internal Power Supply For 520STFM / 1040STF / 1040STE / 4160STE (less Atari metal mounting bracket) 115 or 230 AC Volt 50 / 60 Hz User switchable. UL Listed (E104272) power supply, Schematic / print on the power supply included, with one year warranty!   CB101638 CALL

Atari Replacement Mother Boards

520STFM NTSC / U.S. Mother Board 1/2 Meg Memory with R.F. Modulator Less plug in chips. This 520STFM mother board can be upgraded to a 1040ST mother board by removing the solder from the 16 ram chip holes, soldering in 16 , 16 pin I.C. sockets and 16 .224 caps and 3 resistors. Most boards have a Blitter location (solder in holes). Can be upgraded to a Blitter chip by removing the solder from the socket holes, soldering in one of Best's Gold Plated 68 pin sockets and remove the solder from two solder pads around the Blitter chip. Most 520STFM mother boards have the ability to accept either 2 chip or 6 chips TOS ROM's!     CB102403 $125.00
520ST NTSC / U.S. Mother Board1/2 Meg Memory, Fully Populated CB102505 $154.00
520STM NTSC / U.S. Mother Board with 1/2 Meg Memory and R.F. Modulator, Less plug in chips CB101480-M $85.00
520STM NTSC / U.S. Mother Board with 1/2 Meg Memory and R.F. Modulator, Fully Populated CB102506 $180.00
520STFM NTSC / Fully Populated U.S. Mother Board, 1/2 Meg Memory with R.F. Modulator Same mother board as the Above but Fully Populated.    CB102501 $220.00
1040STF NTSC / U.S. Mother Board 1 Meg Memory, Less plug in chips.   CB101502   $125.00
1040STF NTSC / Fully Populated U.S. Mother Board, 1 Meg Memory CB102502 $210.00
1040STFM NTSC / U.S. Mother Board With modulator, 1 Meg Memory, Less plug in chips.    CB101502-M $150.00
1040STFM NTSC / Fully Populated U.S. Mother Board with modulator, 1 Meg Memory     CB102502-M $235.00
520STFM / 1040STFM Mother Board P.C.B. Bare, no components soldered in. 32 Ram Chip version.    CB102783 $32.95
1040STE / 4160STE NTSC / U.S. Mother Board, Less plug in chips CB101625 $200.00
1040STE / 4160STE NTSC / U.S. Mother Board, Fully populated LESS SIMMs, LESS TOS CB101625-P $250.00
1040STE / 4160STE Bare / Unpopulated (No components) printed circuit board CB102615 $35.95

 Atari Replacement Floppy Drives

520STFM / 1040STF / Mega Atari 1/2 height DSDD Drives With rhombus shaped long (13/4 inch) eject bar under the disk access opening. 1/2 Height Atari Disk drives are Dysan Investigator Disk Drive Program (CB102865) Tested "Pulls" from working Atari Computers with a full warranty!   CB101690  $99.00
520STFM / 1040STF / 1040STE / 4160STE / Mega / MegaSTe Atari 1/3 height DSDD drives Rhombus shaped eject button (5/8 inch long) on the lower right hand side of the disk access opening.   CB101841  $75.00
Atari 1/2 height drive to 1/3 height drive Conversion Kit. Kit includes a new 1/3 height 520STFM or 1040STF Atari case top, 1/3 height drive spacer set (4) with 3 longer drive mounting screws and one Atari 1/3 height Disk Drive (CB101841). This kit is used to convert the older style Atari 520STFM and 1040STF computers that were supplied with the now obsolete 1/2 height disk drive mechanisms CB102412  $100.00
520STFM / 1040STF / STE / Mega replacement 1/3 + 1/2 height drive transports These Low cost non Atari, very quiet DSDD worm drive stepper drive transports can be installed inside ST / STE / Mega / MegaSTe / TT computers replacing the Atari Factory internal drives with only slight modifications  to the disk eject button opening only. The form, fit (over all size, flat face plate with dust cover and screw pattern) and function is the Same or Better than the factory stock drives INCLUDING disk changes, Disk directory update (ESC Key) and 80 - 82 copy protect Tracks! 1/3 Height Best Drive Version (Replaces Atari drive transports with Rhombus shaped 5/8 inch wide disk eject button) (exact width of eject button may vary).   CB101912 $54.95
1/2 Height Best drive version (Replaces Atari drive transports with Rhombus shaped 1 3/4 inch wide disk eject button) with adapter plate or spacers to bring the 1/3 height version Best drive up to the proper height within the case (exact width of eject button may vary).   CB101913  $62.95

 


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