VOGONS


First post, by kotel

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Hi

I recently got this HP FMB-0902 mobo that's missing some parts. I need specs of:
Mosfet Q24, Q22,
C202, CE90, CE115, CE116, C204,
R4631, R157, R155, R174, R181, R187,
And a capacitor array on the north bridge,
Thats all the missing components i can see. I know this board is a little too new for this forum, but this is my last hope. Any help regarding those components would be nice.

"Sent on a mission, to protect the last treasures. Through struggle and strife we can see the light. Even if our mission is partially complete, Our efforts are not in vain.
Let that be our legacy."
-Stronghold 5-5

Reply 1 of 7, by kotel

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Got pretty much all of the specs of the missing parts.
Q24 is FDD8796 while Q22 is 1AM (same transistor as Q13,35,36)
CE90 is an 470uF 16v
CE115, CE116 are both poly 560uF 4v
R157 and 155 are both 0 (?) 33 ohm resistors (both have only black on them)
R181 and R187 are 10k resistors
R174 is 4.7k
R4631 is an 0 ohm resistor
XTAL is an 14.318mHz (14.318H0K (or is it an O?))
Capacitor array on NB is 4800pF ceramic cap array.

Last edited by kotel on 2024-09-12, 13:26. Edited 2 times in total.

"Sent on a mission, to protect the last treasures. Through struggle and strife we can see the light. Even if our mission is partially complete, Our efforts are not in vain.
Let that be our legacy."
-Stronghold 5-5

Reply 2 of 7, by lti

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R157 and R155 might not be jumpers. Some resistor manufacturers stopped marking their parts.

The "1AM" marking on Q22 is an MMBT3904.

Reply 3 of 7, by Horun

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kotel wrote on 2024-03-24, 06:42:
Hi […]
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Hi

I recently got this HP FMB-0902 mobo that's missing some parts. I need specs of:
Mosfet Q24, Q22,
C202, CE90, CE115, CE116, C204,
R4631, R157, R155, R174, R181, R187,
And a capacitor array on the north bridge,
Thats all the missing components i can see. I know this board is a little too new for this forum, but this is my last hope. Any help regarding those components would be nice.

Ca you post a very clear good picture of the board ? Every one googled can not read the silkscreen (or maybe it just my eyes 🤣).

Hate posting a reply and then have to edit it because it made no sense 😁 First computer was an IBM 3270 workstation with CGA monitor. Stuff: https://archive.org/details/@horun

Reply 4 of 7, by kotel

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lti wrote on 2024-08-25, 20:12:

R157 and R155 might not be jumpers. Some resistor manufacturers stopped marking their parts.

The "1AM" marking on Q22 is an MMBT3904.

Thats what I though too. It was weird how the other resistors measured 33 ohms. Luckily wbahnassi measured the same resistors on his board which had 33 ohms. I have looked on TME if they have the "MMBT3904" and I found this one. Is that the correct transistor?

"Sent on a mission, to protect the last treasures. Through struggle and strife we can see the light. Even if our mission is partially complete, Our efforts are not in vain.
Let that be our legacy."
-Stronghold 5-5

Reply 5 of 7, by lti

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That's the right transistor. It's an extremely common one from multiple manufacturers (some just marked "1A" instead of "1AM").

Reply 6 of 7, by kotel

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I've found these XTAL's cause no idea why but the 14.31818mHz THT XTAL's dissapeared in TME. Will they be okay as a replacement for the original 14.318H0K XTAL?

"Sent on a mission, to protect the last treasures. Through struggle and strife we can see the light. Even if our mission is partially complete, Our efforts are not in vain.
Let that be our legacy."
-Stronghold 5-5

Reply 7 of 7, by kotel

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So after replacing all the misssing parts the board is, frankly, dead. A5 post code and 5 beeps (memory issue). The board also doesn't power on automatically when holding down on SB. The beeps are also weird-ish (not what I'm used to from hp desktops). Now I have no idea if its the cpu (heard an pop sound while trying to get an cap back in place), some part which I've resoldered wrong, lose joint(s) or other...

"Sent on a mission, to protect the last treasures. Through struggle and strife we can see the light. Even if our mission is partially complete, Our efforts are not in vain.
Let that be our legacy."
-Stronghold 5-5