View source for Acer Aspire M1641

{{DeviceAlerts}}
{{InfoboxDevice
|Title = Acer M1641 Motherboard
|Picture = 
|Release Year = 2009
|Mounting Technology = Through Hole, SMD, Sockets
|Capacitor Types = Aluminum Electrolytic, Polymer
|Leak Risk = High
|Batteries = CR232 Clock Backup
|Destructive Entry = No
}}
Non-named motherboard from late 00s mATX PC available in multiple configurations, usually shipped with Vista or Windows 7, intended for home use. Motherboard appears with the same PCB in multiple other component configurations on other late-2000s Aspire M desktop PCs, however study may be non-transferrible.

Uses nVidia nForce 7050 chipset, known to reject some normally-valid configurations.
==Known Issues==
===No boot after changing RAM===
====Causes====
*Total RAM added exceeds 4GB
*RAM exceeds 2GB per DIMM
*Total RAM exceeds 3GB (under certain bios configurations)
*RAM rated speed is too high
====Solutions====
*Reduce total RAM
*Use matched DIMMs
*Use a 1GB DIMM and a 2GB DIMM, please fill out info if you can identify which bios setting causes this
*Try DDR2-800 RAM, the system may fail to boot if the RAM reports being too capable in some cases
===OS Not Recognizing Working PCIe Expansion Device===
====Causes====
*The nForce 7050 chip's limited PCIe stability and compliance is affecting your new expansion device
*Capacitor degradation is causing the device to be rejected
====Solutions====
*Use a different expansion device
*Recap
==Disassembly Notes==
CR232 clock battery is held in with a spring clip that may be live if the battery has charge.

Expansion cards are installed, from factory, using a metal bar which will usually be sharp.

Front drive cage is positioned in a way where it may be necessary to remove all internal drives before removing the motherboard, if there is any obstruction this is greatly recommended as the factory drive installation points will cause the drive to hit a leak-danger cap near the floppy port, or (on lower chance) three leak-danger caps next to the RAM slots.
==Original Parts==
===Possible leak-risk caps===
''AE caps which are at particular danger of leaking''
{| class="wikitable sortable"
|+Capacitor [[Capacitor Specifications|Specifications]] and [[Part Footprints|Footprint]] Information
!RefDes
!Qty
!Capacitance
!Voltage
![https://caps.wiki/wiki/Part_Footprints Mount]
!Diameter
!Height
!Lead Spacing
!Temp
![https://caps.wiki/wiki/Capacitor_Types Type]
!Brand
!Series
!Notes
|-
|EC30, EC71, EC41, EC45, EC57, EC54||6||1000 µF||6.3v||Through-hole||8mm*||16mm*||3.5mm*||-40~105 °C||Aluminum Electrolytic||OST||RLX||High leak risk, low-ESR, navy and gold
|-
|EC28, EC29, EC25, EC26, EC72, EC73, EC74||7||1000 µF||6.3v||Through-hole||8mm*||16mm*||3.5mm*||105 °C||Aluminum Electrolytic||Panasonic||  ||Likely higher-ESR, black and grey
|-
|EC4, EC11, EC107, EC108, EC109, EC110||6||1800 µF||6.3v||Through-hole||8mm*||22mm*||3.5mm*||105 °C||Aluminum Electrolytic||Panasonic||FM possibly?||Low-ESR, black and gold
|-
|EC69, EC68, EC43, EC31, EC33||5||470 µF||16v||Through-hole||8mm||11.5mm||3.5mm||-40~105 °C||Aluminum Electrolytic||United Chemi-Con||KZG||Low-ESR, brown and grey
|}
''Measurements with an asterisk are gleaned through measurement, rather than manufacturer specification, and may be imprecise.''
==Replacement Parts==
===Problem Cap Replacements===
{| class="wikitable sortable"
|+Aluminum Electrolytic Capacitors
!RefDes
!Qty
!Compatible Part Number
!Order Links
!Notes
|-
| EC30, EC71, EC41, EC45, EC57, EC54
EC28, EC29, EC25, EC26, EC72, EC73, EC74
| 13 (6, 7) || OST RLX 6.3v, Panasonic 1000uF ||[https://www.digikey.com/en/products/detail/rubycon/6-3AX1000MEFC8X16/4842272?s=N4IgTCBcDaIGwDoDMBBAGgRgAw4LIFEAxAYQA5M4QBdAXyA DigiKey] [https://www.lcsc.com/product-detail/Aluminum-Electrolytic-Capacitors-Leaded_Rubycon-6-3AX1000MEFC8X16_C1581425.html LCSC]
|
|-
| EC4, EC11, EC107, EC108, EC109, EC110 || 6 || EEU-FR0J152L ||[https://www.digikey.com/en/products/detail/panasonic-electronic-components/EEU-FR0J152L/2433497 Digikey] [https://www.mouser.com/ProductDetail/Panasonic/EEU-FR0J152L?qs=P6akOJY27xVH2gMwMxoTuw%3D%3D Mouser]
|Under-spec
|-
| EC4, EC11, EC107, EC108, EC109, EC110 || 6 || EEU-FS0J182LB ||[https://www.digikey.com/en/products/detail/panasonic-electronic-components/EEU-FS0J182LB/7381149 Digikey] [https://www.mouser.com/ProductDetail/Panasonic/EEU-FS0J182LB?qs=gt1LBUVyoHljKHYQFIcGkA%3D%3D Mouser]
|Over-sized
|-
| EC69, EC68, EC43, EC31, EC33 || 5 || 16ME470WG ||[https://www.lcsc.com/product-detail/Aluminum-Electrolytic-Capacitors-Leaded_SUNCON-SUN-Elec-Industries-16ME470WG_C242033.html LCSC]
|
|}
{| class="wikitable"
|+Aluminum Polymer Capacitors
!RefDes
!Qty
!Compatible Part Number
!Order Links
|-
|EC30, EC71, EC41, EC45, EC57, EC54, EC28, EC29, EC25, EC26, EC72, EC73, EC74
|13
|A750KK108M0JAAE015 / 1026R30610R00
|[https://www.digikey.com/en/products/detail/kemet/A750KK108M0JAAE015/6196437 DigiKey] [https://www.mouser.com/ProductDetail/KEMET/A750KK108M0JAAE015?qs=M6jHmRuQorVeUK%252Bw1IWEAQ%3D%3D Mouser] [https://www.lcsc.com/product-detail/Solid-Capacitors_NJCON-1026R30610R00_C5243863.html LCSC]
|-
|EC4, EC11, EC107, EC108, EC109, EC110
|6
|A750MW188M1CAAE010 / E2182M6R3E130RL
|[https://www.digikey.com/en/products/detail/kemet/A750MW188M1CAAE010/13420149 DigiKey] [https://www.mouser.com/ProductDetail/KEMET/A750MW188M1CAAE010?qs=sGAEpiMZZMvR1wrj203KOIBOOW3024qOFjWclb1ZHWV9coAeL00Z3Q%3D%3D Mouser] [https://www.lcsc.com/product-detail/Solid-Capacitors_Zhaoqing-Ruilong-Elec-E2182M6R3E130RL_C2902678.html LCSC]
|-
|EC69, EC68, EC43, EC31, EC33
|5
|A750EQ477M1CAAE015 / 4710160512R00
|[https://www.digikey.com/en/products/detail/kemet/A750EQ477M1CAAE015/13420057 DigiKey] [https://www.mouser.com/ProductDetail/KEMET/A750EQ477M1CAAE015?qs=vmHwEFxEFR9GgGtKXpsSTA%3D%3D Mouser] [https://www.lcsc.com/product-detail/Solid-Capacitors_NJCON-4710160512R00_C5243841.html LCSC]
|}
'''PREFER ALUMINUM ELECTROLYTIC IF UNSURE'''
''Two of the Panasonic 1800uF capacitors (EC4 and EC11) are crammed closely together. It is not recommendable to change these preventively either way, though particularly much due to difficulty matching electrical specs with a capacitor which will fit.''

''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.''
[[Category:WorkNeeded:OriginalParts]]
[[Category:2000s]]
[[Category:Motherboard]]