Finally - also thanks to the previous post - I got my white "porno" Elitegroup SI54P-AIO repaired 😎
- replaced the caps
- replaced the BIOS chip

BIOS image was not esay to find so hope its OK to upload it here. I kept the Phoenix as its nicer and more unusual than the AWARD that was installed before.

Does anybody knows if rev 1.3 of this motherboard will support the Pentium 133Mhz ? Or maybe the 120Mhz?
And where can i set the muliplier on this board?

Robin4 wrote on 2020-01-02, 13:36:

Does anybody knows if rev 1.3 of this motherboard will support the Pentium 133Mhz ? Or maybe the 120Mhz?
And where can i set the muliplier on this board?

Please post a picture with the Voltage regulator

Mine is unreadable and I am looking for a replacement

Thanks

I have good news here.

My ECS SI54P AIO can use a Pentuim 133 MHZ on this board with that Phoenix v1.7 bios..
I dont think it maybe would do that stock * but i have to test this*
But it will do with an CPU VRM upgrade socket (for socket 5 / 7) which will provide much more multipliers.. On stock they cant be set manually.

I also will included my old Award bios 12 here for just helping out.. But because its a very earlier version it wont reconize faster then the Pentium 100.

The VRM is a single one.. LT1083CP (its a fat one and needs a heatsink)

EDIT:

As far i have tested the board have a hardlocked multiplier of 1.5x ,so the max without modification is @ 100Mhz..

With a mulimedia upgrade socket for 5/7 it will give you additional the Pentium 120 and the Pentium 133.(is the max for this board, but iam not unhappy). Other pentiums wont getting recgonized.

For the max you need at least update the bios to the Phoenix version or the Award 2.0 one..

133mhz is all i need for this moment.

Thanks for the LT1083CP info

Now is time to try and fix mine

Best regards

Robin4 wrote on 2020-01-10, 00:37:

I have good news here. […]
Show full quote

I have good news here.

My ECS SI54P AIO can use a Pentuim 133 MHZ on this board with that Phoenix v1.7 bios..
I dont think it maybe would do that stock * but i have to test this*
But it will do with an CPU VRM upgrade socket (for socket 5 / 7) which will provide much more multipliers.. On stock they cant be set manually.

I also will included my old Award bios 12 here for just helping out.. But because its a very earlier version it wont reconize faster then the Pentium 100.

The VRM is a single one.. LT1083CP (its a fat one and needs a heatsink)

EDIT:

As far i have tested the board have a hardlocked multiplier of 1.5x ,so the max without modification is @ 100Mhz..

With a mulimedia upgrade socket for 5/7 it will give you additional the Pentium 120 and the Pentium 133.(is the max for this board, but iam not unhappy). Other pentiums wont getting recgonized.

For the max you need at least update the bios to the Phoenix version or the Award 2.0 one..

133mhz is all i need for this moment.

Does the Phoenix bios also fixes the CMD controller bug?

Good day,

I am new to this site, hoping for some help to get my grandfathers old computer running so my cousins and I can run some old games we remember playing at their house. When I turn the computer on, I am met with a message:

“System battery is dead - Replace and run SETUP”
“Real time clock error”
(See attached photo)

I’ve opened the case/chassis to inspect the motherboard, but I don’t identify a CMOS battery anywhere. Anyone know where this component is/should be so I can replace it?

Any other suggestions for getting this running and keeping it going for years to come?

I appreciate any input. Thanks!

Hello !
There is a Dallas RTC chip on this motherboard that contains a small battery that eventually dies and can't be replaced.

You need to either replace the whole module with a reproduction (some include a coin cell battery holder to swap it easily) or hack the existing chip to add an external battery.
This is very well documented.

By the way (not related to your question), do you know if this motherboard has a flash BIOS that can be upgraded ? Or does it require to replace the physical BIOS chip ?