View source for NEC VERSA 2760MT

{{DeviceAlerts}}
{{InfoboxDevice
|Title = NEC VERSA 2760MT
|Picture = Nec_versa_2760mt.jpg
|Release Year = 1997
|Mounting Technology = Through Hole, SMD, QFP, BGA, ZIFs Sockets, FFCs, High Density Interconnects 
|Capacitor Types = Aluminum Electrolytic, Tantalum, Ceramic, Polymer
|Leak Risk = High
|Batteries = Yes, CMOS NiMH Rechargeable
|Destructive Entry = Yes, brittle plastics 
}}

The NEC VERSA 2760MT is a PC laptop from 1997 with a 166 MHz Intel Pentium MMX CPU and NeoMagic MagicGraph 128XD GPU.

== Known Issues ==

===Unit does not turn on but battery charges or frequently encounters errors during boot sequence===
====CMOS NiMH battery has died====
*The rechargeable NiMH CMOS battery has a finite cycle life and will fail
*If infrequently used the NiMH CMOS battery will leak
<gallery>
File:Nec versa 2760mt battery damage.jpg|alt=Damage to "RT6 R6MB VER 0.5A" PCB caused by internal rechargeable CMOS battery|Damage to "RT6 R6MB VER 0.5A" PCB caused by internal rechargeable CMOS battery
</gallery>

====Solutions====
*Remove or replace NiMH CMOS battery
*Repair any corrosion damage from leaks

===Unit lags heavily or freezes or turns off suddenly when running demanding applications===
====Thermal interface material between CPU and heatsink is bad====
*The thermal paste will eventually dry out
*The thermal paste will eventually be 'pumped-out'
*This leads to poor thermal performance and overheating
====Solutions====
*Check rear fan is functional
*Clean dust from heatsink & fan
*Replace thermal paste
<gallery>
File:Nec_versa_2760mt_thermal_paste.jpg|alt=Replaced thermal paste|Replaced thermal paste
</gallery>

===Unit does not turn on or charge, PSU LED does not illuminate===
====Mains charger PSU has failed====
*Unknown failure mode
<gallery>
File:Nec versa 2760mt mains adapter.jpg|alt=Label on the mains power adapter|Label on the mains power adapter
</gallery>

====Solutions====
*Attempt to repair original charger (difficult, glued/ultrasonically welded case)
*Buy new charger with correct specifications with NEC charger adapter (or splice existing charge cable)

== Disassembly Notes ==
*The plastic in this device is thin and extremely brittle, the design relies on the rigidity of the PCBs to support the weight of the device, '''you are very likely to break plastic pieces when attempting a repair'''.
*There are a number of thin flat-flex cables and locking/hinged FFC ZIFs in this device, they are difficult to manipulate and prone to damage.
*There are a number of high density interconnects in this device, they must be disconnected and connected by applying even force without twisting the connectors to avoid damage.
*Use ESD safe equipment

== Original Parts ==
=== Motherboard ===
''RT6 R6MB VER=0.5A''
<gallery>
File:nec_versa_2760mt_rt6_r6mb_0.5a.jpg|alt=RT6 R6MB (Version 0.5A) PCB|RT6 R6MB (Version 0.5A) PCB
</gallery>


=== IO Board ===
''RT6 R6IO VER=0.4D''
<gallery>
File:nec_versa_2760mt_rt6_r6io_0.4d.jpg|alt=RT6 R6IO (Version 0.4D) PCB|RT6 R6IO (Version 0.4D) PCB
</gallery>

=== CPU Board ===
''RT6 R6CPU VER=0.3''

==Replacement Parts==
===Basic PCB Name===
{| class="wikitable sortable"
|+Capacitors
! RefDes
! Qty
! Compatible Part Number
! Order Links
|-
|
|
|
|[https://www.digikey.com/ Digikey]
|}
''If parts are not available or different selection is preferred, you can use the values in the [[#Original_Parts|Original Parts]] section to perform a parametric search.''

===Kits===
* Digikey BOM: https://www.digikey.com/

== Related Links ==

== References ==
<references />
[[Category:Computer]]
[[Category:1990s]]
[[Category:WorkNeeded:General]]