I had this problem before. The pc board in the pc for the hmc went bad. IBM had to replace the pc for the hmc.
Thanks Shelia Chalk Mainframe System Programmer [email protected] -----Original Message----- From: IBM Mainframe Discussion List <[email protected]> On Behalf Of Radoslaw Skorupka Sent: Monday, April 14, 2025 3:26 PM To: [email protected] Subject: [EXT] Re: HMC hang up (z16) Please Note: This email is from an [EXTERNAL] sender. Do not click on links or attachments unless you expect them from the sender and know the content is safe. Please contact the Service Desk if you have any concerns regarding this message. Reboot? How??? Method 1: Logon to HMC and select Reboot. However no user can log on. Method 2: unplug power from both power supplies. This is the thing I described already and I don't want to perform. Note: SE (Primary or Alternate) is a guest virtual machine of HMC. Method 3: please advice. Last but not least: reboot does not solve the problem. -- Radoslaw Skorupka Lodz, Poland W dniu 14.04.2025 o 22:12, Allan Staller pisze: > Classification: Confidential > > Reboot the hmc. > > -----Original Message----- > From: IBM Mainframe Discussion List<[email protected]> On > Behalf Of Radoslaw Skorupka > Sent: Monday, April 14, 2025 2:55 PM > To:[email protected] > Subject: HMC hang up (z16) > > [CAUTION: This Email is from outside the Organization. Unless you > trust the sender, Don’t click links or open attachments as it may be a > Phishing email, which can steal your Information and compromise your > Computer.] > > I have observed the following problem: > HMC is hanging up. > I connect to HMC using web browser. So far so good. > Then I click "logon", type user and password and... nothing happens. For > hours. > The same problem occurs when I try to logon using local console. > The console is working, I can logon to SE directly, but not to the HMC. > It is *not* single case, since three HMCs were affected. Two of them are > ordered with z16 and reside inside CEC cabinet, the third is carried forward > stand alone PC station (inherited from z15). The HMC version is 2.16.0. > > Note: for standalone HMC I simply removed PS cable and enforced PC reboot. It > helped. I don't dare to repeat this brutal method for built in HMA/HMC. > > Note2: Both SE works like a charm. I can switch them, logon, etc. The second > HMC inside the CEC box is also OK. > > > Any clue? > > > -- > Radoslaw Skorupka > Lodz, Poland ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ======================================= This email, and any files transmitted with it, is confidential and intended solely for the use of the individual or entity to which it is addressed. If you have received this email in error, please notify the system manager. This message contains confidential information and is intended only for the individual named. If you are not the named addressee, you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately by e-mail if you have received this message by mistake and delete this e-mail from your system. If you are not the intended recipient, you are notified that disclosing, copying, distributing or taking any action in reliance on the contents of this information is strictly prohibited. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
