Linksys EA7300 V2 Router...Identify 6 pin chip

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Linksys EA7300 V2 Router...
Identify 6 pin chip
I need help to ID a 6 pin (probably sot-23-6)  chip under different marking...
I have purchased a lot of 30 (for parts) Routers of of eBay, 15 of them has a 6 pin chip shorted. Same ship, different marking.
1x=S13
1x=F4W
1x=R2G
Its a very small chip, about 1.08mm by 1.90mm. It shows different voltage on different pins on a working unit.   
Thanks in advance¡

[s-manuals.com]

Hello
Attach a photo of the chip

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 Im trying to upload the file. Ill make it smaller The upload folder is full. Please try a smaller file and/or contact an administrator.

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I keep trying to upload with, no luck,
Its a very small 6pin chip, About 1.80mm with by 2.90 mm long. Similar to a eeprom, but smaller and only 6 pin. On some routers  same chip has different coded numbers.
1x=S13
1x=F4W
1x=R2G
I'm surprise the Linksys community doesn't  have any comments on this chip. I have about 10 routers that don turn on, because of this chip.