I think it is a Zener diode but there is no marking except a '5' and five parallel lines (polarity?).
The component is on a Dumbo2 Rev2.1 motherboard for the Ideapad Z710.
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4\$\begingroup\$ Welcome to EE.SE. The easy way is to power up the board and measure the voltage across this diode. \$\endgroup\$– user105652Mar 26, 2018 at 2:00
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\$\begingroup\$ Thank you for you suggestion. Unfortunately the component is on the "wrong" side of the motherboard. I can't access it to measure the voltage. \$\endgroup\$– Amii274Mar 26, 2018 at 4:45
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\$\begingroup\$ What the 5 number stand for? on the smd code i found -5 =5 and >5 but no 5 lines over the number 5 \$\endgroup\$– Amii274Mar 26, 2018 at 4:47
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1\$\begingroup\$ I do not understand. You were able to get a clear close up view, but you cannot get probes to it? The number 5 by itself means nothing. These parts are too tiny to silkscreen a full part number or part code on them. \$\endgroup\$– user105652Mar 26, 2018 at 4:59
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2\$\begingroup\$ Solder on a pair of fine gauge insulated wires to the diode, 22 to 26 awg will do, and run them outside the case so you can mostly close it up. There is always a trick to diagnose a problem. \$\endgroup\$– user105652Mar 26, 2018 at 5:16
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1 Answer
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Probably RB751V-40 Schottky diode, datasheet: http://www.rohm.com/web/in/datasheet/RB751V-40
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\$\begingroup\$ That is great - Thank you very much to all of you - this just shows the power of the community. \$\endgroup\$– Amii274Mar 26, 2018 at 16:24