Bios sometimes does not recognise my Sata HDD

My ASUS X555 lb laptop goes to bios while booting (looping) sometimes. when I checked the bios I found that bios is not recognizing the sata hdd. If I switch off the system, if I am lucky, the system works without any issue. This issue commonly occurs.

I tried Linux and Windows 10 OS and in both cases issue with non detection of hdd is present.

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Hi, Have you tried a different HDD in case yours is stating to fail? Is the BIOS detecting the DVD drive when it does not detect the HDD? If it does detect the DVD drive have you tried booting of a DVD to see if the SATA controller might be the issue?

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It always detect DVD drive. I did not try another HDD as sometimes (1 out of 4 boots) the bios detects HDD and works fine without any issue. I dont want to shed money for new HDD without diagnosing the issue. Jayeff, do you suspect a failed HDD? If so, why it works fine sometimes. Will formatting HDD helps?

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Hi,

My thinking is that it is the same SATA controller for both drives (I may be wrong with this of course) and the DVD never fails to be seen so therefore I think that it could be either a HDD power problem, HDD connection problem or HDD circuit problem. Try reseating the HDD and see if it improves any.

Check to see if there is a HDD diagnostic test program provided by the HDD manufacturer.

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Thanks for the info. On further troubleshooting I found laptop boots without problem as long as it is kept in that position. If it is shaken then bios found problem in detection of harddisk. I removed the harddisk and refitted the same and this problem appears after some time. Could it be a problem with harddisk (internal) or problem with connector? Another observation made is that as long as I keep laptop on without moving it works perfectly once it gets booted.

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Hi,

It appears that you have narrowed it down to the connector area BUT which side of the connector, the HDD or the motherboard? The only way to find out is to change the HDD and see if the problem stays or goes. Have you got an old one to try or access to an old one that you can borrow?

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The hard drive needs to be re-seated if bios is periodically not recognizing the hard disk,

Sometimes due to heat, the heat can make internals expand, then when shut off it contracts which causes things to become loose.

I suggest taking the bottom panel off by unscrewing all the screws and disassembling it.

1. Take out battery and unplug the power source.

2. Unscrew all the necessary screws to remove the bottom panel

  • from this point Ground yourself to a Metal object frequently by touching anything metallic in color or conductive, a metal post, wire, or even a doorknob*
  • Do not scrub your feet, shoes, socks on the ground, or carpet*

Once finished proceed to step #3

3. Locate the hard drive and unscrew the base screws holding it in

4 *ground yourself*

5 remove the drive gently by sliding it out of the SATA Port.

6 Examine the copper connections of the hard drive's pins, Take a clean rag and damp it with rubbing alcohol and lightly wipe both sides of the pins clean, wait to dry then reconnect the drive by sliding it back in gently into the motherboards SATA port.

7 Make sure its nice and snug and give it a little wiggle, then proceed to put the back cover back on and screw in all the screws.

8 You can now re-insert the battery, then plug it into a power supply,

9 Press the Power button and it should boot and recognize the drive

---Please keep me updated!----

Best regards,

Repair Pug

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Hello I have the same problem. I did clean the HDD and the computer boots in windows. HDD was scanned and says its error free. This morning i turned the laptop on and no HDD was recognized but after applying pressure above the connector of the HDD board (near alt car key) it booted normally after the second try. Has your issue persisted? I'm thinking of strengthening the connector joints as per this video https://www.youtube.com/watch?v=DXrZd5cF... because the solution above was only temporary. Have you tried doing this or your issue was solved the first time? or did you replace the HDD board? Thanks in advance

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