Saw and used many series routerboard
But not the clear behavior rb493g causes feeling not completions of this board
On what I have come across, I use it
I can not force in any way is normal to start 493g if the card is inserted micro-sd
As it looks.
At inserted micro-sd constantly starts backup-booter from pm27lv512 (ver2.28) (though bootloader versions have been updated till 2.29)
RouterBOOT booter 2.28
RouterBoard 493G
Authorization: Passed
CPU frequency: 680 MHz
Memory size: 256 MB
Press any key within 2 seconds to enter setup.
loading kernel from nand… data is corrupted
trying bootp protocol…
If to include or switch off time 3-4 that all the same it is loaded router-boot 2.29
Both the system normally starts also a card is normally visible, as well as it is necessary to it
RouterBOOT booter 2.29
RouterBoard 493G
CPU frequency: 680 MHz
Memory size: 256 MB
Press any key within 2 seconds to enter setup.
loading kernel from nand… OK
setting up elf image… OK
jumping to kernel code
Tried many cards from kingston (2gb) and even ancient with a size in 256mb
At remove cards always starts 2.29 and the system is loaded without problems
On 433uah these cards work without problems
format nand>> netinstall
When you format nand from the loader all is formatted nand and the loader which is killed before has been stitched there (2.29)
Remains native which in pm29lv512 it is stitched (2.28)
Did it many times on others routerboard there this problem isn’t present.
Yes smd capacitor is present
Tell it is possible to solve most?
Skills of the soldering smd and even tsop it is enough microcircuits
To know as where to correct
To send back on a guarantee in other country fussy enough
Please use a magnifying glass to check if the capacitor is securely placed. If not, you could try to fix it. But anyway, you should contact the seller for warranty repair/
The soldering ideal
What face value at capacitor?
It would be desirable to learn in what particularly problem?
In original photos this part is absent…
It not software a problem?
Simply I doubt that there not regularly that that from the point of view of chips or the soldering
Most likely it is an error to you it is known also its decision it is any updating of the scheme
If the nobility what…
My RB493G came with this capacitor but there is strange behavior when SD card is inserted… When SD card is inserted quantity of bad blocks progressively increases. But even if I remove SD card and make NAND formatting quantity of BAD blocks stays as before.
mikrotik 493g crude board
That I described all these problems is in all board 493g
1.bad block (that that was primary not so it is developed with I/O in these board (chip NAND is serviceable 100 %)
At presence sd record glitches in nand increase in two
2.bootloader at inserted sd to a card often refuses to start or it is rolled away on default on SIP flash
Hi Normis, what can be the issues caused when that part is missing?
I currently have rolled out a bunch of 493G’s which - after 6 weeks of operation - start to crash and reboot periodically.
I have no idea as to why they are doing this. There was no change in configuration.
What’s significant is that bad-blocks are detected after that short period of time. 0,1% up to 0,3% and more - where then board won’t boot to operational state anymore.
Power supply shouldn’t be the causing one, because there are different PSU used in field. And other boards connected to that same PSU are not affected.
