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| Anritsu MS2721B internal CF card missing |
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| analogRF:
--- Quote from: nexus on August 15, 2022, 01:59:19 am ---Ethernet controller getting hot. Now removed but no changes. --- End quote --- no that chip always gets too hot. it's normal |
| analogRF:
--- Quote from: nexus on August 15, 2022, 01:57:46 am ---Assuming that the onboard flash is corrupt ( 2 x (RC28F256P30B85)), would trying to get these ICs from a parts unit be a good strategy? Perhaps the non-corrupt chips could be read and new copies could be programmed? I can find new ones on eBay: https://www.ebay.com/itm/334463856043?hash=item4ddf996dab:g:gXcAAOSwvrRfvcFu Plus stencils: https://www.ebay.com/itm/193122926047?var=493309027882 Has anyone been able to read or successfully transfer images from these ICs? I see that there were two versions of firmware stickers on mine. Not sure if it went back to Anritsu at some point and was updated. Also, my ethernet IC was also 50C + like another person had experienced. I removed it but the unit's behavior has not changed. Nothing else sticks out on thermals. Remember that this unit was fully operational before the attempted firmware update that killed it. I would hope that if it is as simple as corrupt flash, then salvaging the image from another analyzer and replacing the bad memory could fix it. --- End quote --- I assume you are sure there is (was) no LAN connection and also bootstrap mode didnt work, right? if that is the case, I can only assume the flash is corrupted. I am sure anritsu has a way of writing them in place but since we dont know how, copying from a working flash or replacing the flash chips with working ones should work. My understanding is that the bootloader resides on those flash memories, so if it is not starting, they are corrupted during the update. unless there is a hardware failur that just happened during the update even though the unit was ok before. so make sure all voltages on all the chips are present. IIRC the unit with no CF card will just sit on the Anritsu logo screen I have one laying around here, I will take out the CF card and see what happens but I am pretty sure it just sits idle on the splash screen |
| nexus:
understood, thank you for confirming this --- Quote from: analogRF on August 15, 2022, 03:47:24 am --- --- Quote from: nexus on August 15, 2022, 01:59:19 am ---Ethernet controller getting hot. Now removed but no changes. --- End quote --- no that chip always gets too hot. it's normal --- End quote --- |
| nexus:
--- Quote from: analogRF on August 15, 2022, 03:59:22 am --- I assume you are sure there is (was) no LAN connection and also bootstrap mode didnt work, right? if that is the case, I can only assume the flash is corrupted. I am sure anritsu has a way of writing them in place but since we dont know how, copying from a working flash or replacing the flash chips with working ones should work. My understanding is that the bootloader resides on those flash memories, so if it is not starting, they are corrupted during the update. unless there is a hardware failur that just happened during the update even though the unit was ok before. so make sure all voltages on all the chips are present. IIRC the unit with no CF card will just sit on the Anritsu logo screen I have one laying around here, I will take out the CF card and see what happens but I am pretty sure it just sits idle on the splash screen --- End quote --- I tried recovery mode with no connections, with LAN, and with USB all separately. No changes in that respect. I see some parts units on eBay. If they are not missing the flash chips I will try getting one of those for cheap. Interestingly, once in a while the unit will just sit at the splash screen. No green bar or other text, just "Anritsu" white screen without blinking. This is with no CF. Maybe once I get a CF reader and can unpack and load FW, perhaps it may be able to keep booting. Would be interested to know what your good unit does with no CF. I wonder if the "1-3-5" recovery mode should be accessible without CF installed? |
| analogRF:
ok I was a little wrong but not by much :D. Without CF card in the unit, this is what I get (see the pictures) The fault red light is always on. After turning on, the boot process is exactly like normal and right after the brief selftest message at the bottom the unit gets stuck at the image shown here complaining about OS. But up to this point it behaves exactly like normal. 1-3-5 bootstrap mode works exactly as normal. It does not care about CF card at all. It is also able to connect to LAN and I can see it on MST software |
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