# \[Modding\]\[OT\] Replacing a eMMC chip on a CM4 module **URL:** \ **Category:** Off-Topic\ **Tags:** modding\ **Created:** [January 13, 2024, 8:16am UTC](https://community.homey.app/t/modding-ot-replacing-a-emmc-chip-on-a-cm4-module/101147 "2024-01-13T08:16:39Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![Dijker](https://avatars.discourse-cdn.com/v4/letter/d/b9bd4f/32.png) [@Dijker](https://community.homey.app/u/Dijker)\ **Post date:** [January 13, 2024, 8:16am UTC](https://community.homey.app/t/modding-ot-replacing-a-emmc-chip-on-a-cm4-module/101147/1 "2024-01-13T08:16:39Z")
> [@\[HowTo\]\[Modding\] Homey Pro (Early 2023) - Resize user Partition on eMMC](https://community.homey.app/t/howto-modding-homey-pro-early-2023-resize-user-partition-on-emmc/81591/57): > > Then only reason because we can. > /OT > I think it is a little bit Off-Topic for the Homey Community, but starting is from the Topic [[HowTo] Homey Pro (Early 2023) - Resize user Partition on eMMC](https://community.homey.app/t/howto-homey-pro-early-2023-resize-user-partition-on-emmc/81591) > This now is a Topic on it’s own for the daredevils that can solder … > [Modding][OT] Replacing a eMMC chip on a CM4 module Next-level because we can… 😉 was by Ivan Kuleshov replacing the eMMC chip self. (On a CM4 module, not on a Homey …) [x.com](https://twitter.com/Merocle/status/1412398981913710599) ![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/7/9/794c5c54e7c13216be55c1ba2f55ebfef8c23fd7.jpeg) But Yes, probably Homey first becomes very slow, especially at boot with more than ~100 apps ? and then needs more space on Flash, even with a 8 GB Memory . ---
**Author:** ![Sharkys](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/sharkys/32/54029_2.png) [@Sharkys](https://community.homey.app/u/Sharkys)\ **Post date:** [January 13, 2024, 8:31am UTC](https://community.homey.app/t/modding-ot-replacing-a-emmc-chip-on-a-cm4-module/101147/2 "2024-01-13T08:31:39Z")
/OT2 Here is how to do that 😉 [![](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/0/0/00c266c53d65ee987bbd6f129cda075fa74aaf6e.jpeg "Raspberry Pi Compute Module 4 - 128 GB eMMC upgrade") ](https://www.youtube.com/watch?v=DHB3EMZNTiQ) (probably other author) ---
**Author:** ![Ranney](https://avatars.discourse-cdn.com/v4/letter/r/848f3c/32.png) [@Ranney](https://community.homey.app/u/Ranney)\ **Post date:** [January 13, 2024, 5:13pm UTC](https://community.homey.app/t/modding-ot-replacing-a-emmc-chip-on-a-cm4-module/101147/3 "2024-01-13T17:13:43Z")
Hmm. Got the stuff I need to replace already. Anybody an idea where to buy the flash chip? ---
**Author:** ![Sharkys](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/sharkys/32/54029_2.png) [@Sharkys](https://community.homey.app/u/Sharkys)\ **Post date:** [January 13, 2024, 8:08pm UTC](https://community.homey.app/t/modding-ot-replacing-a-emmc-chip-on-a-cm4-module/101147/4 "2024-01-13T20:08:52Z")
> [@Ranney](#): > > Anybody an idea where to buy the flash chip? It depends, even China… 256GB > **[80.2US $ |Klmeg8ucta-b041 153fbga Emmc 5.1 256gb Flash Memory Klmeg8ucta -...](https://www.aliexpress.com/i/2251832816472801.html?dp=61e47a726ec3b25c50959f54&cn=ah&aff_fcid=1b9fdaa3887f4ee0a2f0f772c22a523b-1705176153471-01582-_sSETun&aff_fsk=_sSETun&sk=_sSETun&gatewayAdapt=4itemAdapt)** > > Smarter Shopping, Better Living! Aliexpress.com There is also more projects like that : > **[GitHub - mfolejewski/CM4\_256GB\_CM4108256: Raspberry Pi CM4 module with 256GB...](https://github.com/mfolejewski/CM4_256GB_CM4108256/)** > > Raspberry Pi CM4 module with 256GB eMMC memory. Contribute to mfolejewski/CM4\_256GB\_CM4108256 development by creating an account on GitHub. While 256GB is overkill, there are some other compatible chips, eg. SDINBDD4-64GB [https://eu.mouser.com/ProductDetail/SanDisk/SDINBDG4-32G?qs=5aG0NVq1C4z9lU36cd%2FBzA%3D%3D](https://eu.mouser.com/ProductDetail/SanDisk/SDINBDG4-32G?qs=5aG0NVq1C4z9lU36cd%2FBzA%3D%3D) Note : original chip seems to be SAMSUNG 32GB KLMBG2JETD-B041 …but soldering such eMMC chip require really good equipment and skills ;-( ---
**Author:** ![Ranney](https://avatars.discourse-cdn.com/v4/letter/r/848f3c/32.png) [@Ranney](https://community.homey.app/u/Ranney)\ **Post date:** [January 13, 2024, 8:30pm UTC](https://community.homey.app/t/modding-ot-replacing-a-emmc-chip-on-a-cm4-module/101147/5 "2024-01-13T20:30:11Z")
Hmm, maybe not so much overkill if it also has ‘load balancing’. ☺ And I know. I’m a amateur solder. But has some good results with my simple mph30 (with community firmware). So still some hope I can exchange the chip with this tool ☺ Thanks for the info! ---
**Author:** ![Sharkys](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/sharkys/32/54029_2.png) [@Sharkys](https://community.homey.app/u/Sharkys)\ **Post date:** [January 13, 2024, 8:40pm UTC](https://community.homey.app/t/modding-ot-replacing-a-emmc-chip-on-a-cm4-module/101147/6 "2024-01-13T20:40:37Z")
> [@Ranney](#): > > mph30 You mean Miniware MHP30 SMD Rework Hot Plate ? There might be problem with the temperature and also you would need BGA reballing stencil / reballing platform EMMC BGA153 or how it’s called together with BGA balls (Sn63Pb37, 0.3mm size) for reballing…and courage, but if your CM4 is dead, you have not much to loose 😉 ---
**Author:** ![Ranney](https://avatars.discourse-cdn.com/v4/letter/r/848f3c/32.png) [@Ranney](https://community.homey.app/u/Ranney)\ **Post date:** [January 13, 2024, 9:59pm UTC](https://community.homey.app/t/modding-ot-replacing-a-emmc-chip-on-a-cm4-module/101147/7 "2024-01-13T21:59:20Z")
Haha, that was exactly my idea. Not so much to loose and I already have 2 CM4 modules that are not working anymore (flash issue). But… the flash module is a little bit expensive on itself. I will try to find a smaller one for experimental replacement ☺👍 And yes, that one. I have bought it for one project (my primary soldering station was not enough). But surprised how ‘easy’ it is to desolder and solder a chip from/to a board. 💪 Ps. What is the problem with the temperature? ---
**Author:** ![Sharkys](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/sharkys/32/54029_2.png) [@Sharkys](https://community.homey.app/u/Sharkys)\ **Post date:** [January 14, 2024, 8:47am UTC](https://community.homey.app/t/modding-ot-replacing-a-emmc-chip-on-a-cm4-module/101147/8 "2024-01-14T08:47:39Z")
> [@Ranney](#): > > Ps. What is the problem with the temperature? It was about maximum temperature and duration applied but can’t find exactly the statement, so just from another source : `When soldering,please make sure that the temperature for lead-free /No Pb BGA chips is 245℃-260℃(Maximum),Leaded/Pb BGA chips 180℃-205℃(Maximum).` So in your case, I guess you are applying heat from the bottom of PCB ? Might be more gentle than with hot air station… when / if you will doing it, definitively document for community 😉 ---
**Author:** ![Dijker](https://avatars.discourse-cdn.com/v4/letter/d/b9bd4f/32.png) [@Dijker](https://community.homey.app/u/Dijker)\ **Post date:** [January 14, 2024, 6:29pm UTC](https://community.homey.app/t/modding-ot-replacing-a-emmc-chip-on-a-cm4-module/101147/9 "2024-01-14T18:29:53Z")
Moved … > [@Dijker](#): > > This now is a Topic on it’s own for the daredevils that can solder … > [Modding][OT] Replacing a eMMC chip on a CM4 module