Old motherboard ATC Trend 7110M - Page 1
Forum section: electronics / general

author: GGMM
author_rank: Frequent Contributor
timestamp: November 09, 2024, 09:58:19 pm
content: hello,I received this 30 year old ATC TREND 7110M motherboard for trying to modify a 54810 oscilloscope.. It worked very well for a week, and then the screen went black. The test with a PC Analyzer card gives a memory error. It’s a bit like there is no communication with the memory or something like that.Indeed, before its implementation, I tested several rams, and I wonder if this did not create a false contact problem by pressing the connector of the ram on another component. On youtube, we talk about the circuit Northbridge which must be here a FW82443LX.In fact they are reflow the circuit to resolve.Before doing this, I will recheck the signals to the oscilloscope.Your opinion on that.Thank's

author: GGMM
author_rank: Frequent Contributor
timestamp: November 24, 2024, 10:37:37 am
content: Hello,I’ve re welded the north and sudbridge via hot air. I’ve tested with other processors. I checked the voltages on the processor and signals on the Ram OK. Capacitors do not seem inflated. But the memory (tested on another card still OK ) is not detected. Support in good condition. Of course test reset to zero the CMOS and battery test. The visual is good no trace suspicious, no short circuit.The motherboard worked with the same elements.So, a little short on ideas...Have you one?cdt

author: GGMM
author_rank: Frequent Contributor
timestamp: March 02, 2025, 05:53:43 pm
content: Hello,I will get back to you regarding this ATC 7110M motherboard.It is a card bought on an ad site and which worked very well, but it broke down after one month.For your information, I never plugged in a speaker on this card. (Important, see end of the post)Now, it gives no video signal, no num lock, no setup choice or other, no beepWhat I tested:Visual analysis, state of capacitors, connexions, etcBattery test, bios reset, voltage and CPU test, memory, address, oscilloscope signals analysis, data, clock, etc on the processor, memory, bios rom, etcTest by changing the processor and memory.And I always end up with the same result.No beep on speaker, no video, no possibility of num lock, etc.If I put a card analyzer the result is:C9 6E CA 49 E7 81 7E 84 DD 4C 66 4A 7D 06 56 60 D6 24 EE F1 A5 34 EA E7 4F E3 01 6E 3E F5 D5 A8 AD F5 50 2A 2E 40 06 F1 7C A4 47 8A 72 5E 0C 38 68 98 C4 F4 FC 08 38 64 94 C0 F0 FC.NB the bios is an Award Bios PCI/PNP 686I have not all information of a lot of codes in the documentation with the analyzer cardYou have information of this motherboard on the retroweb siteIt seems that the memory is not functional (I tested 8 others 3.3v modules and they work on another motherboard.!)Despite everything, there are the circuits north and southbridge that I could test (No connexions possible)Your opinions....cdt

author: GGMM
author_rank: Frequent Contributor
timestamp: March 03, 2025, 09:32:23 am
content: Re,little question,I would like to know what type of programmer to use for these old bios chips. (see picture)If you have an example to give me (Example of model on site Ali...)Moreover, at this moment, I do not know the type of component used in this effect. If you know.I’m considering checking the bios, unless the LX440 is a problem. In fact I’m running out of ideas and waiting for yourThank you

author: coromonadalix
author_rank: Super Contributor
timestamp: March 04, 2025, 04:15:11 pm
content: the photo is not good we don't see the numbers, too smallfor the motherboard did you check all the capacitors if they are not buldged, leakedmotherboard manual attachedas for bios programmingcheck any programmer device list support(s), there is a tons of them at low pricestl886 1st gen can do some or manyxegcu t48 t56 or the newest t76 ..you had many programmers who could do it, lab tools, dataman, chipmaster .... xeltek, elnec, galep, stag .... svod ...

author: GGMM
author_rank: Frequent Contributor
timestamp: March 05, 2025, 08:17:39 am
content: Coromonadalix,The altered bios is only an assumption.The chip is a Winbond W29C020CEverything has been screened, as already said. (Analysis with the oscilloscope of the processor signals, memories, clocks...., card status, capacitors, bios reset, other power supply, etc). Never sound a beep!!!!Tested 8 differents memory (3.3v) that work on an equivalent motherboard.I will never find the schematic of the motherboard, but I am based on it from Intel (LX440)Also attached some links on the bios.https://www.wimsbios.com/faq.jsp#gsc.tab=0https://www.elhvb.com/mboards/a-trend/bios/index.htmlYou have the bios of the 7110M. (If someone can program me the ATC-7110M and send it to me, that would be nice)Also read, that the brigde chips are fragile and can fail.(82371 and 82443).In short, too much time has been spent on this.cdt

author: GGMM
author_rank: Frequent Contributor
timestamp: March 06, 2025, 06:10:23 pm
content: Re,That day, I reworked on this famous motherboard. I was interested in the fact that one did not beep.And then, I found that the transistor that drove the speaker had a self power cut.I replaced it and finally that beep. I would almost say, because the bios Award, provided few beep.So, if I don’t put a memory, I have a long beep. (What is normal with bios Award)And when I put memory, I’m at the same point. (No beep) and code FC F0 on the display of the analyzer.It remains to find out why.to be continued....

author: GGMM
author_rank: Frequent Contributor
timestamp: March 07, 2025, 04:50:57 pm
content: hi,One question:Can we identify the type of Bios Award with the serial number on the label? (Chipset and manufacturer)?remember, no screen !!!See here:https://www.wimsbios.com/awardnumbers.jsp#gsc.tab=0On mine, it is indicated on label PCI/PNP 686 s/n 172573601I would like to be sure that matches for the good chipset and manufacturerSince I don’t have a programmer, I can’t read the Winbond chip, but one order is in progress.About the Winbond chip, I found this post, but I don’t want to get lost, do you ever know if the chip would have been replaced?https://www.eevblog.com/forum/repair/replace-a-27c1001-eprom-with-a-29c020-eeprom-possible/msg3368320/#msg3368320cdt

author: GGMM
author_rank: Frequent Contributor
timestamp: March 08, 2025, 05:44:00 pm
content: re,Can you see with the oscilloscope if a WinBond chip of the motherboard has its contents corrupted?I explain: If I do not put ram on the motherboard, it makes a long beep continuously.You can see that D0 D7 signals workIf I put ram, the signals D0 D7 work for a few moments, then they all go to the high state. (all is stuck)I think you understand, what I mean, a part of the bios would be corrupted, for example the Ram test(?)It can also be said that there is a self-control of the content.it can also be said that other thing can stuck.If someone have some experience in this domain.Anyway, as I ordered a programmer, I would be fixed by doing a rewrite.cdt

author: GGMM
author_rank: Frequent Contributor
timestamp: March 14, 2025, 04:34:17 pm
content: Hi,I received my programmer Willem from China. Connected to a PC XP and put the software 098D12.It worked the first time.Reading and saving the contents of the WinBond W29C020C chipThen writing a content of the bios found on the retroWeb site.The comparison showed some differences.Installation on the motherboard and boot-up.BINGO, it worked the first time.My diagnosis was correct.Happy!!!!Now, i will contnue the Oscilloscope Agilent 54810cdt